21061895

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{1663}}^1$

素因数の和:1834

約数の個数: 16

約数和(自身を含む): 26956800

約数和(自身を除く): 5894905

約数列:

[1, 5, 17, 85, 149, 745, 1663, 2533, 8315, 12665, 28271, 141355, 247787, 1238935, 4212379, 21061895]

約数ペア:

[(1, 21061895), (5, 4212379), (17, 1238935), (85, 247787), (149, 141355), (745, 28271), (1663, 12665), (2533, 8315)]