Divisor Sum of 21,735

Example of Sigma Function of Integer

 * $\sigma \left({21 \, 735}\right) = 46 \, 080$

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

Proof
We have that:
 * $21 \, 735 = 3^3 \times 5 \times 7 \times 23$

Hence: