21163640

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31123}}^1$

素因数の和:31151

約数の個数: 32

約数和(自身を含む): 50420880

約数和(自身を除く): 29257240

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31123, 62246, 124492, 155615, 248984, 311230, 529091, 622460, 1058182, 1244920, 2116364, 2645455, 4232728, 5290910, 10581820, 21163640]

約数ペア:

[(1, 21163640), (2, 10581820), (4, 5290910), (5, 4232728), (8, 2645455), (10, 2116364), (17, 1244920), (20, 1058182), (34, 622460), (40, 529091), (68, 311230), (85, 248984), (136, 155615), (170, 124492), (340, 62246), (680, 31123)]