20907685

素因数分解:

$5^1\times {\mathrm{67}}^1\times {\mathrm{139}}^1\times {\mathrm{449}}^1$

素因数の和:660

約数の個数: 16

約数和(自身を含む): 25704000

約数和(自身を除く): 4796315

約数列:

[1, 5, 67, 139, 335, 449, 695, 2245, 9313, 30083, 46565, 62411, 150415, 312055, 4181537, 20907685]

約数ペア:

[(1, 20907685), (5, 4181537), (67, 312055), (139, 150415), (335, 62411), (449, 46565), (695, 30083), (2245, 9313)]