Divisor Sum of 152,990

Example of Sigma of Integer

 * $\sigma \left({152 \, 990}\right) = 275 \, 400$

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

Proof
We have that:
 * $152 \, 990 = 2 \times 5 \times 15 \, 299$

Hence: