20618680

素因数分解:

$2^3\times 5^1\times {\mathrm{499}}^1\times {\mathrm{1033}}^1$

素因数の和:1543

約数の個数: 32

約数和(自身を含む): 46530000

約数和(自身を除く): 25911320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499, 998, 1033, 1996, 2066, 2495, 3992, 4132, 4990, 5165, 8264, 9980, 10330, 19960, 20660, 41320, 515467, 1030934, 2061868, 2577335, 4123736, 5154670, 10309340, 20618680]

約数ペア:

[(1, 20618680), (2, 10309340), (4, 5154670), (5, 4123736), (8, 2577335), (10, 2061868), (20, 1030934), (40, 515467), (499, 41320), (998, 20660), (1033, 19960), (1996, 10330), (2066, 9980), (2495, 8264), (3992, 5165), (4132, 4990)]