21890590

素因数分解:

$2^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{103}}^1\times {\mathrm{401}}^1$

素因数の和:564

約数の個数: 32

約数和(自身を含む): 40637376

約数和(自身を除く): 18746786

約数列:

[1, 2, 5, 10, 53, 103, 106, 206, 265, 401, 515, 530, 802, 1030, 2005, 4010, 5459, 10918, 21253, 27295, 41303, 42506, 54590, 82606, 106265, 206515, 212530, 413030, 2189059, 4378118, 10945295, 21890590]

約数ペア:

[(1, 21890590), (2, 10945295), (5, 4378118), (10, 2189059), (53, 413030), (103, 212530), (106, 206515), (206, 106265), (265, 82606), (401, 54590), (515, 42506), (530, 41303), (802, 27295), (1030, 21253), (2005, 10918), (4010, 5459)]