Amicable numbers

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(Math.) two numbers, each of which is equal to the sum of all the aliquot parts of the other.
- Bouvier.

See also: Amicable

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Hunting amicable numbers was another fascinating game.
Well-represented here are Euler's contributions to geometry, including his enhancements of Pythagoras, number theory, including his work on odd perfect numbers and amicable numbers, combinatorics, including his work on Venn diagrams and orthogonal matrices, and a full range of his work in analysis, one article of which shows how Euler discovered America.
Lovers looked for mates whose names were equal to theirs or, even better, tried to establish pairs of amicable numbers, where the sum of the proper factors of one equaled the other, and vice versa, such as 220 and 284.