Divisor Sum of 12,915

Example of Sigma Function of Integer

 * $\map \sigma {12 \, 915} = 26 \, 208$

where $\sigma$ denotes the $\sigma$ function.

Proof
We have that:
 * $12 \, 915 = 3^2 \times 5 \times 7 \times 41$

Hence: