Divisor Sum of Integer/Examples

Examples of Divisor Sum of Integer

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

$\sigma_1$ of $1$

$\map {\sigma_1} 1 = 1$

$\sigma_1$ of $3$

$\map {\sigma_1} 3 = 4$

$\sigma_1$ of $12$

$\map {\sigma_1} {12} = 28$

$\sigma_1$ of $20$

$\map {\sigma_1} {20} = 42$

$\sigma_1$ of $24$

$\map {\sigma_1} {24} = 60$

$\sigma_1$ of $40$

$\map {\sigma_1} {40} = 90$

$\sigma_1$ of $44$

$\map {\sigma_1} {44} = 84$

$\sigma_1$ of $48$

$\map {\sigma_1} {48} = 124$

$\sigma_1$ of $207$

$\map {\sigma_1} {207} = 312$

$\sigma_1$ of $12 \, 496$

$\map {\sigma_1} {12 \, 496} = 26 \, 784$

$\sigma_1$ of $14 \, 288$

$\map {\sigma_1} {14 \, 288} = 29 \, 760$