21538153

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{12457}}^1$

素因数の和:12496

約数の個数: 16

約数和(自身を含む): 27905920

約数和(自身を除く): 6367767

約数列:

[1, 7, 13, 19, 91, 133, 247, 1729, 12457, 87199, 161941, 236683, 1133587, 1656781, 3076879, 21538153]

約数ペア:

[(1, 21538153), (7, 3076879), (13, 1656781), (19, 1133587), (91, 236683), (133, 161941), (247, 87199), (1729, 12457)]