20217740

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{23509}}^1$

素因数の和:23561

約数の個数: 24

約数和(自身を含む): 43446480

約数和(自身を除く): 23228740

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 23509, 47018, 94036, 117545, 235090, 470180, 1010887, 2021774, 4043548, 5054435, 10108870, 20217740]

約数ペア:

[(1, 20217740), (2, 10108870), (4, 5054435), (5, 4043548), (10, 2021774), (20, 1010887), (43, 470180), (86, 235090), (172, 117545), (215, 94036), (430, 47018), (860, 23509)]