21891485

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{8123}}^1$

素因数の和:8153

約数の個数: 24

約数和(自身を含む): 33340896

約数和(自身を除く): 11449411

約数列:

[1, 5, 7, 11, 35, 49, 55, 77, 245, 385, 539, 2695, 8123, 40615, 56861, 89353, 284305, 398027, 446765, 625471, 1990135, 3127355, 4378297, 21891485]

約数ペア:

[(1, 21891485), (5, 4378297), (7, 3127355), (11, 1990135), (35, 625471), (49, 446765), (55, 398027), (77, 284305), (245, 89353), (385, 56861), (539, 40615), (2695, 8123)]