21351095

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{991}}^1$

素因数の和:1166

約数の個数: 16

約数和(自身を含む): 26664960

約数和(自身を除く): 5313865

約数列:

[1, 5, 31, 139, 155, 695, 991, 4309, 4955, 21545, 30721, 137749, 153605, 688745, 4270219, 21351095]

約数ペア:

[(1, 21351095), (5, 4270219), (31, 688745), (139, 153605), (155, 137749), (695, 30721), (991, 21545), (4309, 4955)]