21122800

素因数分解:

$2^4\times 5^2\times {\mathrm{52807}}^1$

素因数の和:52825

約数の個数: 30

約数和(自身を含む): 50748488

約数和(自身を除く): 29625688

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 52807, 105614, 211228, 264035, 422456, 528070, 844912, 1056140, 1320175, 2112280, 2640350, 4224560, 5280700, 10561400, 21122800]

約数ペア:

[(1, 21122800), (2, 10561400), (4, 5280700), (5, 4224560), (8, 2640350), (10, 2112280), (16, 1320175), (20, 1056140), (25, 844912), (40, 528070), (50, 422456), (80, 264035), (100, 211228), (200, 105614), (400, 52807)]