Divisor Sum of 28,665

Example of Sigma Function of Integer

 * $\sigma \left({28 \, 665}\right) = 62 \, 244$

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

Proof
We have that:
 * $28 \, 665 = 3^2 \times 5 \times 7^2 \times 13$

Hence: