66756980

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{8161}}^1$

素因数の和:8579

約数の個数: 24

約数和(自身を含む): 140549640

約数和(自身を除く): 73792660

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 4090, 8161, 8180, 16322, 32644, 40805, 81610, 163220, 3337849, 6675698, 13351396, 16689245, 33378490, 66756980]

約数ペア:

[(1, 66756980), (2, 33378490), (4, 16689245), (5, 13351396), (10, 6675698), (20, 3337849), (409, 163220), (818, 81610), (1636, 40805), (2045, 32644), (4090, 16322), (8161, 8180)]