19725820

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{22937}}^1$

素因数の和:22989

約数の個数: 24

約数和(自身を含む): 42389424

約数和(自身を除く): 22663604

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 22937, 45874, 91748, 114685, 229370, 458740, 986291, 1972582, 3945164, 4931455, 9862910, 19725820]

約数ペア:

[(1, 19725820), (2, 9862910), (4, 4931455), (5, 3945164), (10, 1972582), (20, 986291), (43, 458740), (86, 229370), (172, 114685), (215, 91748), (430, 45874), (860, 22937)]