Divisor Sum of 19,215

Example of Sigma Function of Integer

 * $\sigma \left({19 \, 215}\right) = 38 \, 688$

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

Proof
We have that:
 * $19 \, 215 = 3^2 \times 5 \times 7 \times 61$

Hence: