18798740

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{21859}}^1$

素因数の和:21911

約数の個数: 24

約数和(自身を含む): 40397280

約数和(自身を除く): 21598540

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 21859, 43718, 87436, 109295, 218590, 437180, 939937, 1879874, 3759748, 4699685, 9399370, 18798740]

約数ペア:

[(1, 18798740), (2, 9399370), (4, 4699685), (5, 3759748), (10, 1879874), (20, 939937), (43, 437180), (86, 218590), (172, 109295), (215, 87436), (430, 43718), (860, 21859)]