Definitions
Wiktionary
- n. Plural form of amicable number.
GNU Webster's 1913
- adj. (Math.) two numbers, each of which is equal to the sum of all the aliquot parts of the other.
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artoparts's Words
illation, finite, edify, abide, abrade, vouch, amiss, vociferate, perusing, techantiquery, rigamarole, holon and 615 more...
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Your number's up.
Types and sets of numbers
natural numbers, integers, rational, surd, irrational, real, imaginary, complex, transcendental, surreal, prime, secant numbers and 53 more...
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sionnach Any pair of integers a,b such that the factors of b add up to a and the factors of a add up to b.
220,284 represents such a pair, since 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.
Mathematical Aphrodisiac
Nov 17, 2007