19717780

素因数分解:

$2^2\times 5^1\times {\mathrm{797}}^1\times {\mathrm{1237}}^1$

素因数の和:2043

約数の個数: 24

約数和(自身を含む): 41492808

約数和(自身を除く): 21775028

約数列:

[1, 2, 4, 5, 10, 20, 797, 1237, 1594, 2474, 3188, 3985, 4948, 6185, 7970, 12370, 15940, 24740, 985889, 1971778, 3943556, 4929445, 9858890, 19717780]

約数ペア:

[(1, 19717780), (2, 9858890), (4, 4929445), (5, 3943556), (10, 1971778), (20, 985889), (797, 24740), (1237, 15940), (1594, 12370), (2474, 7970), (3188, 6185), (3985, 4948)]