Divisor Sum of 15,435

Example of Sigma Function of Integer

 * $\sigma \left({15 \, 435}\right) = 31 \, 200$

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

Proof
We have that:
 * $15 \, 435 = 3^2 \times 5 \times 7^3$

Hence: