20631455

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{18671}}^1$

素因数の和:18706

約数の個数: 16

約数和(自身を含む): 28232064

約数和(自身を除く): 7600609

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 18671, 93355, 242723, 317407, 1213615, 1587035, 4126291, 20631455]

約数ペア:

[(1, 20631455), (5, 4126291), (13, 1587035), (17, 1213615), (65, 317407), (85, 242723), (221, 93355), (1105, 18671)]