20939620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80537}}^1$

素因数の和:80559

約数の個数: 24

約数和(自身を含む): 47356344

約数和(自身を除く): 26416724

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80537, 161074, 322148, 402685, 805370, 1046981, 1610740, 2093962, 4187924, 5234905, 10469810, 20939620]

約数ペア:

[(1, 20939620), (2, 10469810), (4, 5234905), (5, 4187924), (10, 2093962), (13, 1610740), (20, 1046981), (26, 805370), (52, 402685), (65, 322148), (130, 161074), (260, 80537)]