21145901

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{647}}^1$

素因数の和:713

約数の個数: 24

約数和(自身を含む): 26593920

約数和(自身を除く): 5448019

約数列:

[1, 7, 23, 29, 49, 161, 203, 647, 667, 1127, 1421, 4529, 4669, 14881, 18763, 31703, 32683, 104167, 131341, 431549, 729169, 919387, 3020843, 21145901]

約数ペア:

[(1, 21145901), (7, 3020843), (23, 919387), (29, 729169), (49, 431549), (161, 131341), (203, 104167), (647, 32683), (667, 31703), (1127, 18763), (1421, 14881), (4529, 4669)]