21099856

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{77573}}^1$

素因数の和:77598

約数の個数: 20

約数和(自身を含む): 43286292

約数和(自身を除く): 22186436

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 77573, 155146, 310292, 620584, 1241168, 1318741, 2637482, 5274964, 10549928, 21099856]

約数ペア:

[(1, 21099856), (2, 10549928), (4, 5274964), (8, 2637482), (16, 1318741), (17, 1241168), (34, 620584), (68, 310292), (136, 155146), (272, 77573)]