20493417

素因数分解:

$3^1\times 7^2\times {\mathrm{109}}^1\times {\mathrm{1279}}^1$

素因数の和:1405

約数の個数: 24

約数和(自身を含む): 32102400

約数和(自身を除く): 11608983

約数列:

[1, 3, 7, 21, 49, 109, 147, 327, 763, 1279, 2289, 3837, 5341, 8953, 16023, 26859, 62671, 139411, 188013, 418233, 975877, 2927631, 6831139, 20493417]

約数ペア:

[(1, 20493417), (3, 6831139), (7, 2927631), (21, 975877), (49, 418233), (109, 188013), (147, 139411), (327, 62671), (763, 26859), (1279, 16023), (2289, 8953), (3837, 5341)]