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Two or more natural numbers with a common abundancy index
In number theory, friendly numbers are two or more natural numbers with a common abundancy index, the ratio between the sum of divisors of a number and
Friendly_number
Topics referred to by the same term
Look up friendly in Wiktionary, the free dictionary. Friendly may refer to: Friendly, West Yorkshire, England, a settlement Friendly, Maryland, United
Friendly
2025 South Korean television series
Friendly Rivalry (Korean: 선의의 경쟁) is a South Korean teen mystery thriller television series based on the webtoon of the same name by Song Chae-yoon and
Friendly_Rivalry
Accidental attack on friendly forces
In military terminology, friendly fire or fratricide is an unintentional attack by allied or neutral forces on friendly troops while attempting to attack
Friendly_fire
Disconnected sporting event
football, most club sides play a number of friendlies before the start of each season (called pre-season friendlies). Friendly football matches are considered
Exhibition_game
Set of integers in graph theory
labels. The friendly index of the labeling is the absolute value of the difference between the number of edges labeled 0 and the number of edges labeled
Friendly-index_set
Natural number
Weisstein, Eric W. "Kissing Number". mathworld.wolfram.com. Retrieved 2020-08-03. Griess, Jr., Robert L. (1982). "The Friendly Giant" (PDF). Inventiones
6
U.S. East Coast restaurant chain
Friendly's is a restaurant chain on the East Coast of the United States. The first location, selling ice cream cones, opened in 1935 in Springfield, Massachusetts
Friendly's
2025 Marvel Studios animated series
Your Friendly Neighborhood Spider-Man is an American animated television series created by Jeff Trammell for the streaming service Disney+, based on Marvel
Your Friendly Neighborhood Spider-Man
Your_Friendly_Neighborhood_Spider-Man
1990 studio album by the Charlatans
Some Friendly is the debut studio album by British rock band the Charlatans that was released on 8 October 1990 through Beggars Banquet Records imprint
Some_Friendly
British mutual life and investment organization
Scottish Friendly Assurance Society Limited is a leading mutual life and investments organisation based in Glasgow, Scotland. It provides a range of investment
Scottish_Friendly
2008 studio album by Friendly Fires
Life". Friendly Fires originally debuted on the UK Albums Chart at number 38 on 13 September 2008. The following week, the album fell to number 88, before
Friendly_Fires_(album)
American jurist and judge (1903–1986)
Henry Jacob Friendly (July 3, 1903 – March 11, 1986) was an American jurist who served as a federal circuit judge on the United States Court of Appeals
Henry_Friendly
Fictional cartoon ghost
Casper the Friendly Ghost is a fictional character who appeared in animated short films produced by Paramount Pictures' Famous Studios. He is a translucent
Casper_the_Friendly_Ghost
English indie rock band
Friendly Fires are an English indie rock band from St Albans, Hertfordshire. The band consists of vocalist Ed Macfarlane and guitarist Edd Gibson; drummer
Friendly_Fires
There have been many thousands of friendly fire incidents in recorded military history, accounting for an estimated 2% to 20% of all casualties in battle
List of friendly fire incidents
List_of_friendly_fire_incidents
AI to benefit humanity
Friendly artificial intelligence (friendly AI or FAI) is hypothetical artificial general intelligence (AGI) that would have a positive (benign) effect
Friendly artificial intelligence
Friendly_artificial_intelligence
Defunct British television channel
Friendly TV was a British television channel, owned by Hi2 Limited. Much of the channel's output was made up of interactive programmes and games which
Friendly_TV
Canadian composer and musician
Friendly Rich, born Richard Marsella, is a Canadian music composer and musician from Brampton, Ontario. He has independently released a number of albums
Friendly_Rich
Classification of military personnel casualties
have been killed due to a hostile attack. KIAs include those killed by friendly fire during combat, but not from incidents such as accidental vehicle crashes
Killed_in_action
Natural number
made up of twenty finite simple groups that are all subquotients of the friendly giant, the largest of twenty-six sporadic groups. An icosagon is a polygon
20_(number)
Number divisible only by 1 and itself
A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbers. A natural number greater than 1 that
Prime_number
Australian supermarket chain
Friendly Grocer (formerly known as Four Square) is a small supermarket banner operating in Australia. The banner was founded in New Zealand in 1923 and
Friendly_Grocer
Friendly society
The Foresters Friendly Society is a British friendly society which was formed in 1834 as the Ancient Order of Foresters. As of 31 December 2016, the society
Foresters_Friendly_Society
British charitable organisation
The Girls' Friendly Society (GFS) is a charitable organisation that empowers girls and young women aged 5 to 25, encouraging them to develop their full
Girls'_Friendly_Society
Webcomic by J. D. Frazer
User Friendly was a webcomic written by J. D. Frazer, also known by his pen name Illiad. Starting in 1997, the strip was one of the earliest webcomics
User_Friendly
2008 single by Friendly Fires
"Paris" is the second single by Friendly Fires taken from the band's self-titled debut album Friendly Fires. The song features backing vocals from the
Paris_(Friendly_Fires_song)
1979 American television film
did not report publicly the number of non-battle deaths or their names on its weekly casualty lists during the war. Friendly Fire is adapted by Fay Kanin
Friendly_Fire_(1979_film)
2004 single by Helmet
Blabbermouth.net referred to the song as a pop-inflected, airplay-friendly number that bears more resemblance to the generic rock you hear on your modern
See_You_Dead
Numbers obtained by adding the two previous ones
month, the number of pairs of rabbits is equal to the number of mature pairs (that is, the number of pairs in month n – 2) plus the number of pairs alive
Fibonacci_sequence
Number used for counting
natural-number results: subtracting a larger natural number from a smaller one results in a negative number and dividing one natural number by another
Natural_number
Driver Friendly is an American rock band from Austin, Texas, United States. Driver Friendly has toured with such bands as Motion City Soundtrack, Cartel
Driver_Friendly
Descriptor for responsive electrical devices
considered grid friendly if they operate in a manner that supports electrical grid reliability through demand response. Basic grid-friendly devices may incorporate
Grid_friendly
2007 single by Lifehouse
alternative rock and pop punk influences. It was described as a "radio-friendly number with hooks aplenty" by Alex Lai of Contactmusic.com. John DiBiase of
First_Time_(Lifehouse_song)
Brazilian footballer (born 1980)
performances in back-to-back friendlies against Argentina in the same month. In October, he performed well against Mexico in a friendly, scoring a free kick to
Ronaldinho
Integer having a non-trivial divisor
A composite number is a positive integer that can be formed by multiplying two smaller positive integers. Accordingly, it is a positive integer that has
Composite_number
Natural number
the order of the Friendly Giant F1. Additionally, 19 also divides the orders of the Janko groups J1 and J3. 19 is a Heegner number. The James Webb Space
19_(number)
Internet error message
message rather than replacing what is served with a browser-specific "friendly" error message (in Internet Explorer, this behavior is triggered when a
HTTP_404
American football player and soldier (1976–2004)
media attention, especially when it was discovered he had been killed by friendly fire. Tillman played college football for the Arizona State Sun Devils
Pat_Tillman
Number equal to the sum of its proper divisors
In number theory, a perfect number is a positive integer that is equal to the sum of its positive proper divisors, that is, divisors excluding the number
Perfect_number
1980 studio album by the Alan Parsons Project
The Turn of a Friendly Card is the fifth studio album by the British progressive rock duo the Alan Parsons Project, released in 1980 by Arista Records
The_Turn_of_a_Friendly_Card
Natural number
known to be a solitary number. 18 is the smallest number known to have this property; for 10, 14, and 15, their status as friendly or solitary is not known
18_(number)
Argentine footballer (born 1987)
made his first-team debut when he came on in the 75th minute during a friendly against FC Porto on 16 November 2003. His performance impressed the technical
Lionel_Messi
Pet-friendly housing options in US colleges
Pet-friendly residence halls have appeared as a number of colleges and universities in the United States. In 2008, USA Today estimated that at least 12
Pet-friendly_dormitories
1982 children's novel by Roald Dahl
The BFG (short for The Big Friendly Giant) is a 1982 children's novel by British author Roald Dahl. It is an expansion of a short story from Dahl's 1975
The_BFG
President of CBS News
Fred W. Friendly (born Ferdinand Friendly Wachenheimer, October 30, 1915 – March 3, 1998) was a president of CBS News and the creator, along with Edward
Fred_W._Friendly
Dictator of Cambodia from 1975 to 1979
the 1980s, said that he was "very likeable, a really nice person. He was friendly, and everything he said seemed very sensible. He would never blame you
Pol_Pot
American supermarket chain
Tops Friendly Markets is an American supermarket chain based in Amherst, New York, that operates stores in upstate New York, Vermont, and Northern Pennsylvania
Tops_Friendly_Markets
Number that is the numerator of the generalized harmonic number H_(n,2)
In mathematics, a Wolstenholme number is a number that is the numerator of the generalized harmonic number Hn,2. The first such numbers are 1, 5, 49,
Wolstenholme_number
2018 single by Gryffin and Zohara
confessional and tonally upbeat" as well as a "dance worthy, sing-a-long friendly number that visualizes bittersweet reminiscence on prior romance through a
Remember (Gryffin and Zohara song)
Remember_(Gryffin_and_Zohara_song)
World Health Organization initiative in India since 1992
The Baby Friendly Hospital Initiative (BFHI), also known as Baby Friendly Initiative (BFI), is a worldwide programme of the World Health Organization (WHO)
Baby Friendly Hospital Initiative
Baby_Friendly_Hospital_Initiative
1981 single by The Alan Parsons Project
of a Friendly Card. In the U.S., the song peaked at No. 15 on the Billboard Hot 100. On the U.S. Adult Contemporary chart, "Time" peaked at number 10.
Time (The Alan Parsons Project song)
Time_(The_Alan_Parsons_Project_song)
Portuguese footballer (born 1972)
16 October 1991, in a friendly match that ended 1–1 when he was only 18 years old. His first goal equalised in a 2–1 friendly victory over Bulgaria in
Luís_Figo
Type of bank fraud
Friendly fraud, also known as chargeback fraud, occurs when a consumer makes a purchase with their own credit card, and then requests a chargeback from
Friendly_fraud
Figurate number
equilateral triangle. The triangular lattice representing the nth triangular number contains n rows: the first row contains one point, the second row contains
Triangular_number
Capacity of a system for its users to perform tasks
Usability or user-friendliness is the capacity of a system to provide a condition for its users to perform the tasks safely, effectively, and efficiently
Usability
Brevity code for NATO communications
arena.* [A/A] BASE [+/- number] Reference number used to indicate such information as headings, altitude, fuels, etc. BAT(S) FRIENDLY net-enabled glide weapon(s)
Multi-service tactical brevity code
Multi-service_tactical_brevity_code
Web browser content blocking extension
developed by a Quebecois programmer...Raymond Hill" "uBlock, the Memory-Friendly Ad-Blocker, Is Now Available for Firefox" (January 27, 2015) uBlock was
UBlock_Origin
1988 single by Belinda Carlisle
Media wrote, "Shirelles meet Richard Marx in this definitively radio-friendly number." Stuart Maconie from NME commented, "'World Without You' is so seamless
World_Without_You
Program of the Dave Thomas Foundation for Adoption
The Adoption-Friendly Workplace is a signature program of the Dave Thomas Foundation for Adoption that encourages employers to offer adoption benefits
Adoption-Friendly_Workplace
Discrete probability distribution
discrete probability distribution that expresses the probability of a given number of events occurring in a fixed interval of time if these events occur with
Poisson_distribution
Typical jersey number and their field position correlation in association football
with them, hence central defenders wearing number 5, and remnants of the system remain. For example, in friendly and championship qualifying matches England
Squad number (association football)
Squad_number_(association_football)
Annual event dedicated to bonfires, fireworks and celebrations
The Irish Times. Retrieved 21 December 2019. "15,000 to attend family friendly bonfires tonight". Irishexaminer.com. 23 June 2017. Retrieved 21 December
Bonfire_Night
1996 compilation album by Nina Hagen
"Wir Leben Immer Noch (Lucky Number)" "Cosma Shiva" "Zarah" (Dance Mix) "Zarah" (Dub) "My Way" Ruhlmann, William. "14 Friendly Abductions (review)". AllMusic
14_Friendly_Abductions
Comic-style book series by Jeff Kinney
Jefferson's Awesome Friendly Spooky Stories, was released on March 16, 2021. A sequel, titled Rowley Jefferson's Awesome Friendly Spooky Stories 2, was
Diary_of_a_Wimpy_Kid
American Western drama television series (1974–1983)
Charles Ingalls. Conflict between Friendly's and Landon's vision for the show ultimately led to the disinvolvement of Friendly in the production, leaving complete
Little House on the Prairie (1974 TV series)
Little_House_on_the_Prairie_(1974_TV_series)
1971 album by Marvin Gaye
pop culture. "Flyin' High (In the Friendly Sky)", which took its title from a United Airlines tag, "fly the friendly skies", dealt with dependence on heroin
What's_Going_On_(album)
English footballer and manager (born 1981)
was given the number 16 shirt, previously worn by Keane. Carrick made his debut for the club on 4 August 2006 in a 3–1 pre-season friendly win over Porto
Michael_Carrick
1988 film by Hayao Miyazaki
moving with their father to the countryside, experience interactions with friendly wood spirits in postwar Japan. The film explores themes such as animism
My_Neighbor_Totoro
2011 studio album by Friendly Fires
from British alternative dance band Friendly Fires. It was released in the UK on 16 May 2011, and charted at number 6 on the UK Albums Chart. The album
Pala_(album)
English footballer (born 1975)
a friendly match against Spain. On 28 March 2009, Beckham surpassed Moore to hold the record outright when he came on as a substitute in a friendly against
David_Beckham
In number theory, an unusual number is a natural number n whose largest prime factor is strictly greater than n {\displaystyle {\sqrt {n}}} . A k-smooth
Unusual_number
Product of an integer with itself
In mathematics, a square number or perfect square is an integer that is the square of an integer; in other words, it is the product of some integer with
Square_number
Property of cryptographic hash functions
In cryptography, puzzle friendliness is a property of some cryptographic hash functions. SHA-256 is a cryptographic hash function that is thought to have
Puzzle_friendliness
Competitive association football season
FIFA Asean Cup Malaysia v India India v Singapore Indonesia v India Friendly matches India v Panama India v Brazil India v Uruguay New Zealand
2026–27_in_Indian_football
Series of triathlons held around the U.S.
automobiles. This, and the high number of volunteers who line the entire course, make this a relatively safe and kid-friendly event. The bike and run courses
Ironkids
1990–1991 conflict in the Middle East
combatants, the rest of the 379 coalition deaths were from friendly fire or accidents. This number was much lower than expected. Among the American combat
Gulf_War
Flash memory file system
F2FS (Flash-Friendly File System) is a flash file system initially developed by Samsung Electronics for the Linux kernel. The motive for F2FS was to build
F2FS
Plastic bath toys used in oceanography
Friendly Floatees are plastic bath toys (including rubber ducks) marketed by The First Years and made famous by the work of Curtis Ebbesmeyer, an oceanographer
Friendly_Floatees_spill
Integer with a specific property
In number theory, a Sierpiński number is an odd natural number k such that k×2n+1 is composite for all natural numbers n. In 1960, Wacław Sierpiński proved
Sierpiński_number
Association football scheduling agreement
and FIFPro, which sets out which dates can be used for "official" and "friendly" international matches. Individual periods of these dates are commonly
FIFA International Match Calendar
FIFA_International_Match_Calendar
Number used to approximate the square root of 2
starts with 0 and 1, and then each Pell number is the sum of twice the previous Pell number, plus the Pell number before that. The first few terms of the
Pell_number
Positive integer of the form (2^(2^n))+1
In mathematics, a Fermat number, named after Pierre de Fermat (1601–1665), the first known to have studied them, is a positive integer of the form: Fn=22n+1
Fermat_number
Oddfellows grand lodge in Manchester, England
Order of Oddfellows to be the oldest Branch Friendly Society. During these early days, there were a number of disputes and disagreements between the Grand
Grand United Order of Oddfellows
Grand_United_Order_of_Oddfellows
Property of a number
In mathematics, the persistence of a number is the number of times one must apply a given operation to an integer before reaching a fixed point at which
Persistence_of_a_number
U.S. Navy's special operations force
intelligence gathering, and hydrographic reconnaissance, training, and advising friendly militaries or other forces. All active SEALs are members of the U.S. Navy
United_States_Navy_SEALs
American soldier who served in the Korean War
concentrate vicious fire on his position and enabled the friendly elements to withdraw. Later, after friendly troops had returned, Private First Class Kravitz
Leonard_M._Kravitz
1995 film by Brad Silberling
supernatural fantasy comedy film based on the cartoon character Casper the Friendly Ghost. It was directed by Brad Silberling, in his feature directorial debut
Casper_(film)
Dog breed
been used in expeditions in both Arctic and Antarctic regions, and have a friendly and agreeable disposition. The progenitor of the Samoyeds was the Nenets
Samoyed_dog
Argentine footballer (born 2004)
debut for the Argentina under-20 side on 26 March, when he started in a friendly match against the United States. He scored four goals in four appearances
Alejandro_Garnacho
Song
"Friendly Persuasion (Thee I Love)" is a popular song with music by Dimitri Tiomkin and lyrics by Paul Francis Webster. It was published in 1956 and appeared
Friendly Persuasion (Thee I Love)
Friendly_Persuasion_(Thee_I_Love)
Brazilian footballer (born 2001)
goal in a 3–2 friendly away loss against Japan in Tokyo. On 31 March 2026, Martinelli scored his fourth international goal in a friendly against Croatia
Gabriel_Martinelli
European football competition
associations reiterated their intent to further reduce the number of friendly matches. The number of competitive matches was increased from 142 to 168, thus
UEFA_Nations_League
Integer named after Reo Fortune
mathematics In number theory, a Fortunate number is the smallest integer m>1 such that, for a given positive integer n, pn#+m is a prime number, where the
Fortunate_number
Online biomedical database
created by the NLM. A "PubMed Mobile" option, providing access to a mobile friendly, simplified PubMed version, is also available. Simple searches on PubMed
PubMed
1973 educational song from ''Schoolhouse Rock!''
without ever being childish: 'The Magic Number; pulled from the edu-tainment of Schoolhouse Rock! for its friendly vibe", wrote A.D. Amorosi. In a 2009 interview
Three_Is_a_Magic_Number
English pop duo (1981–1986)
pop group. The event was seen as a major watershed moment in increasing friendly bilateral relations between China and the West. In 1986, Wham! disbanded
Wham!
British educational television series
each made up of a certain number of blocks, while representing and being named after that number. A black floating number, called a Numberling, appears
Numberblocks
1998 single by Josh Abrahams and Amiel Daemion
paired with scattershot jungle breakbeats, it was a perfect fusion of radio-friendly pop smarts and club madness". Abrahams met Amiel in 1997. They collaborated
Addicted_to_Bass
United States historic place
Friendly City Building and Jail is a historic town hall and jail located at Friendly, Tyler County, West Virginia. It was built in 1901, and is a small
Friendly City Building and Jail
Friendly_City_Building_and_Jail
travel, tourism, insurance
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travel, tourism, insurance