20990104

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{154339}}^1$

素因数の和:154362

約数の個数: 16

約数和(自身を含む): 41671800

約数和(自身を除く): 20681696

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 154339, 308678, 617356, 1234712, 2623763, 5247526, 10495052, 20990104]

約数ペア:

[(1, 20990104), (2, 10495052), (4, 5247526), (8, 2623763), (17, 1234712), (34, 617356), (68, 308678), (136, 154339)]