20982800

素因数分解:

$2^4\times 5^2\times {\mathrm{52457}}^1$

素因数の和:52475

約数の個数: 30

約数和(自身を含む): 50412138

約数和(自身を除く): 29429338

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 52457, 104914, 209828, 262285, 419656, 524570, 839312, 1049140, 1311425, 2098280, 2622850, 4196560, 5245700, 10491400, 20982800]

約数ペア:

[(1, 20982800), (2, 10491400), (4, 5245700), (5, 4196560), (8, 2622850), (10, 2098280), (16, 1311425), (20, 1049140), (25, 839312), (40, 524570), (50, 419656), (80, 262285), (100, 209828), (200, 104914), (400, 52457)]