Divisor Sum of 267

Example of Divisor Sum of Non-Square Semiprime

 * $\map {\sigma_1} {267} = 360$

where $\sigma_1$ denotes the divisor sum function.

Proof
We have that:
 * $267 = 3 \times 89$

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

Hence: