Amicable numbers
Amicable numbers are two different numbers related in such a way that the sum of the proper divisors of each is equal to the other number. The smallest pair of amicable numbers is (220, 284). They are amicable because the proper divisors of 220 are 1, 2, 4, 5, 10, 11, 20, 22, 44, 55 and 110, of which the sum is 284; and the proper divisors of 284 are 1, 2, 4, 71 and 142, of which the sum is 220. (A proper divisor of a number is a positive factor of that number other than the number itself. For example, the proper divisors of 6 are 1, 2, and 3.)
Amicable numbers10,0001000 (number)1636 in science1866 in science2000 (number)220 (number)284 (number)47 (number)5000 (number)60,0006000 (number)Al-QabisiAliquot sequenceAmenable numberAmiable numberAmicableAmicable numberAmicable pairAmicable pairsArabsCeleus (bird)Deficient numberEuler's RuleEuler's ruleEuler ruleFermat numberFriendly numberJoseph MadachyKamāl al-Dīn al-FārisīList of Iranian mathematiciansList of Martin Gardner Mathematical Games columnsList of amateur mathematiciansList of number theory topicsList of recreational number theory topicsList of theoremsList of unsolved problems in mathematicsMila KunisMuhammad Baqir Yazdi
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Amicable numbers
Amicable numbers are two different numbers related in such a way that the sum of the proper divisors of each is equal to the other number. The smallest pair of amicable numbers is (220, 284). They are amicable because the proper divisors of 220 are 1, 2, 4, 5, 10, 11, 20, 22, 44, 55 and 110, of which the sum is 284; and the proper divisors of 284 are 1, 2, 4, 71 and 142, of which the sum is 220. (A proper divisor of a number is a positive factor of that number other than the number itself. For example, the proper divisors of 6 are 1, 2, and 3.)
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Amicable numbers are two diffe ...... ). (Also see OEIS: and OEIS: )
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Aon dá uimhir arb ionann gach ...... na céadta i gcleasa draíochta.
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Dos números amigos son dos núm ...... el nombre de número perfecto.
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Els nombres amics són dos nomb ...... propis és igual a ell mateix.
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En arithmétique, deux nombres ...... , alors l'autre est déficient.
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In matematica, sono numeri ami ...... ), è chiamato numero perfetto.
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Liczby zaprzyjaźnione – para r ...... tych liczb równa się drugiej.
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Matematikan, zenbaki laguna, b ...... zenbaki perfektua esaten zaio.
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Números amigos são dois número ...... menor par de números amigos é
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Spřátelená čísla (též přátelsk ...... 68) (sekvence A063990 v OEIS).
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Amicable numbers
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Amikebla nombro
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Befreundete Zahlen
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Bevriende getallen
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Liczby zaprzyjaźnione
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Nombres amicaux
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Nombres amics
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Numeri amicabili
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Número amigo
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Números amigos
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author
Weisstein, Eric W.
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title
Amicable Pair
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Euler's Rule
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Thâbit ibn Kurrah Rule
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urlname
AmicablePair
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EulersRule
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ThabitibnKurrahRule
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Amicable numbers are two diffe ...... ivisors of 6 are 1, 2, and 3.)
@en
Aon dá uimhir arb ionann gach ...... na céadta i gcleasa draíochta.
@ga
Dos números amigos son dos núm ...... 2, 4, 71 y 142, que suman 220.
@es
Els nombres amics són dos nomb ...... 3 × 2n - 1,r = 9 × 22n-1 - 1,
@ca
En arithmétique, deux nombres ...... , alors l'autre est déficient.
@fr
In matematica, sono numeri ami ...... 4, 6232 e 6368, 17296 e 18416.
@it
Liczby zaprzyjaźnione – para r ...... tych liczb równa się drugiej.
@pl
Matematikan, zenbaki laguna, b ...... zenbaki perfektua esaten zaio.
@eu
Números amigos são dois número ...... menor par de números amigos é
@pt
Spřátelená čísla (též přátelsk ...... 68) (sekvence A063990 v OEIS).
@cs