The following are the first few examples of what: (220, 284), (1184, 1210), (2620, 2924), (5020, 5564) & (6232, 6368)?

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The following are the first few examples of what: (220, 284), (1184, 1210), (2620, 2924), (5020, 5564) & (6232, 6368)?
posted Dec 5, 2018

Amicable numbers
Amicable numbers are two different numbers where the sum of the proper divisors of one of the numbers is equal to the other. (A proper divisor is a positive integer other than the number itself.) For example, the proper divisors of 220 are 1, 2, 4, 5, 10, 11, 20, 22, 44, 55 & 110, which total 284; the proper divisors of 284 are 1, 2, 4, 71, & 142, which total 220.

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