Divisor Sum of 152,990

Example of Divisor Sum of Integer

 * $\map {\sigma_1} {152 \, 990} = 275 \, 400$

where $\sigma_1$ denotes the divisor sum function.

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

Hence: