amicable number

短语

相亲数

发音

US

词形变化

amicable numbers 复数 amicable numbers

释义与例句

n.
  1. 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.

    相亲数

    亲和数

    数学

    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.