Divisor Sum of 83,328

Example of Sigma Function of Integer

 * $\map \sigma {83 \, 328} = 261 \, 120$

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

Proof
We have that:
 * $83 \, 328 = 2^7 \times 3 \times 7 \times 31$

Hence: