21012080

素因数分解:

$2^4\times 5^1\times {\mathrm{262651}}^1$

素因数の和:262664

約数の個数: 20

約数和(自身を含む): 48853272

約数和(自身を除く): 27841192

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 262651, 525302, 1050604, 1313255, 2101208, 2626510, 4202416, 5253020, 10506040, 21012080]

約数ペア:

[(1, 21012080), (2, 10506040), (4, 5253020), (5, 4202416), (8, 2626510), (10, 2101208), (16, 1313255), (20, 1050604), (40, 525302), (80, 262651)]