Integers Differing by 2 with Same Divisor Sum/Examples/54

Example of Integers Differing by 2 with Same Divisor Sum
Let $\sigma_1: \Z_{>0} \to \Z_{>0}$ denote the divisor sum function.

Then:
 * $\map {\sigma_1} {54} = \map {\sigma_1} {56} = 120$

Proof
From :
 * $\map {\sigma_1} {54} = 120$

From :
 * $\map {\sigma_1} {56} = 120$

Hence the result.