20215685

素因数分解:

$5^1\times 7^2\times {\mathrm{109}}^1\times {\mathrm{757}}^1$

素因数の和:885

約数の個数: 24

約数和(自身を含む): 28515960

約数和(自身を除く): 8300275

約数列:

[1, 5, 7, 35, 49, 109, 245, 545, 757, 763, 3785, 3815, 5299, 5341, 26495, 26705, 37093, 82513, 185465, 412565, 577591, 2887955, 4043137, 20215685]

約数ペア:

[(1, 20215685), (5, 4043137), (7, 2887955), (35, 577591), (49, 412565), (109, 185465), (245, 82513), (545, 37093), (757, 26705), (763, 26495), (3785, 5341), (3815, 5299)]