Divisor Sum of 59,554, 936,495, 441,481, 044,788, 091,271, 148,664, 944,796, 300,859, 243,635, 311,219, 048,448

Example of Divisor Sum of Integer
where $\sigma_1$ denotes the divisor sum.

Proof
We have that:

Hence from Divisor Sum of Integer: