Divisor Sum of Non-Square Semiprime/Examples/33

Example of Sigma Function of Non-Square Semiprime

 * $\map \sigma {33} = 48$

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

Proof
We have that:
 * $33 = 3 \times 11$

and so by definition is a semiprime whose prime factors are distinct.

Hence: