amicable number

名词 n.
中文释义

英文释义

名词 n.
  1. One of 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.

词形变化

amicable numbers plural
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