20779280

素因数分解:

$2^4\times 5^1\times {\mathrm{211}}^1\times {\mathrm{1231}}^1$

素因数の和:1455

約数の個数: 40

約数和(自身を含む): 48580224

約数和(自身を除く): 27800944

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 211, 422, 844, 1055, 1231, 1688, 2110, 2462, 3376, 4220, 4924, 6155, 8440, 9848, 12310, 16880, 19696, 24620, 49240, 98480, 259741, 519482, 1038964, 1298705, 2077928, 2597410, 4155856, 5194820, 10389640, 20779280]

約数ペア:

[(1, 20779280), (2, 10389640), (4, 5194820), (5, 4155856), (8, 2597410), (10, 2077928), (16, 1298705), (20, 1038964), (40, 519482), (80, 259741), (211, 98480), (422, 49240), (844, 24620), (1055, 19696), (1231, 16880), (1688, 12310), (2110, 9848), (2462, 8440), (3376, 6155), (4220, 4924)]