20490040

素因数分解:

$2^3\times 5^1\times {\mathrm{512251}}^1$

素因数の和:512262

約数の個数: 16

約数和(自身を含む): 46102680

約数和(自身を除く): 25612640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 512251, 1024502, 2049004, 2561255, 4098008, 5122510, 10245020, 20490040]

約数ペア:

[(1, 20490040), (2, 10245020), (4, 5122510), (5, 4098008), (8, 2561255), (10, 2049004), (20, 1024502), (40, 512251)]