21813407

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{113}}^1$

素因数の和:263

約数の個数: 32

約数和(自身を含む): 28892160

約数和(自身を除く): 7078753

約数列:

[1, 7, 11, 23, 77, 109, 113, 161, 253, 763, 791, 1199, 1243, 1771, 2507, 2599, 8393, 8701, 12317, 17549, 18193, 27577, 28589, 86219, 135487, 193039, 200123, 283291, 948409, 1983037, 3116201, 21813407]

約数ペア:

[(1, 21813407), (7, 3116201), (11, 1983037), (23, 948409), (77, 283291), (109, 200123), (113, 193039), (161, 135487), (253, 86219), (763, 28589), (791, 27577), (1199, 18193), (1243, 17549), (1771, 12317), (2507, 8701), (2599, 8393)]