Amicable Pair/Examples/2620-2924

Example of Amicable Pair
$2620$ and $2924$ are the $3$rd amicable pair:
 * $\map {\sigma_1} {2620} = \map {\sigma_1} {2924} = 5544 = 2620 + 2924$

Proof
Let $\map s n$ denote the aliquot sum of $n$.

By definition:
 * $\map s n = \map {\sigma_1} n - n$

where $\map {\sigma_1} n$ denotes the divisor sum function.

Thus: