20840180

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{6637}}^1$

素因数の和:6803

約数の個数: 24

約数和(自身を含む): 44049768

約数和(自身を除く): 23209588

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 6637, 13274, 26548, 33185, 66370, 132740, 1042009, 2084018, 4168036, 5210045, 10420090, 20840180]

約数ペア:

[(1, 20840180), (2, 10420090), (4, 5210045), (5, 4168036), (10, 2084018), (20, 1042009), (157, 132740), (314, 66370), (628, 33185), (785, 26548), (1570, 13274), (3140, 6637)]