English
Noun
amicable numbers (plural)
#number theory A pair of numbers having the property that the sum of the divisors of each, excluding itself, is equal to the other number.
#:The factors of 220, excluding 220 itself, are 1, 2, 4, 5, 10, 11, 20, 22, 44, 55 and 110 and sum to 284; the factors of 284, excluding 284 itself, are 1, 2, 4, 71, and 142, and sum to 220; hence 220 and 284 are amicable numbers.
Translations
German: befreundete Zahlen
Hebrew: �ספר �����ת� <!--gender?-->
Spanish: números amigos m plural
Swedish: vänskapliga tal <!--gender?-->
See also
abundant number
deficient number
perfect number
sociable numbers
w:Amicable_number|Wikipedia article on amicable numbers
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