21640493

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{139}}^1\times {\mathrm{967}}^1$

素因数の和:1136

約数の個数: 16

約数和(自身を含む): 26019840

約数和(自身を除く): 4379347

約数列:

[1, 7, 23, 139, 161, 967, 973, 3197, 6769, 22241, 22379, 134413, 155687, 940891, 3091499, 21640493]

約数ペア:

[(1, 21640493), (7, 3091499), (23, 940891), (139, 155687), (161, 134413), (967, 22379), (973, 22241), (3197, 6769)]