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Meaning of amicable number | Babel Free

Noun CEFR B2

Definitions

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.

Equivalents

Examples

“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.”

CEFR level

B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

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