66645980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{42181}}^1$

素因数の和:42269

約数の個数: 24

約数和(自身を含む): 141731520

約数和(自身を除く): 75085540

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 42181, 84362, 168724, 210905, 421810, 843620, 3332299, 6664598, 13329196, 16661495, 33322990, 66645980]

約数ペア:

[(1, 66645980), (2, 33322990), (4, 16661495), (5, 13329196), (10, 6664598), (20, 3332299), (79, 843620), (158, 421810), (316, 210905), (395, 168724), (790, 84362), (1580, 42181)]