Divisor Sum of Square-Free Integer/Examples

Examples of Divisor Sum of Square-Free Integer

Let ${\sigma_1}: \Z_{>0} \to \Z_{>0}$ denote the divisor sum: the sum of all the positive integer divisors of $n$.

$\sigma_1$ of $66$

$\map {\sigma_1} {66} = 144$

$\sigma_1$ of $70$

$\map {\sigma_1} {70} = 144$

$\sigma_1$ of $110$

$\map {\sigma_1} {110} = 216$

$\sigma_1$ of $170$

$\map {\sigma_1} {170} = 324$