20916080

素因数分解:

$2^4\times 5^1\times {\mathrm{261451}}^1$

素因数の和:261464

約数の個数: 20

約数和(自身を含む): 48630072

約数和(自身を除く): 27713992

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 261451, 522902, 1045804, 1307255, 2091608, 2614510, 4183216, 5229020, 10458040, 20916080]

約数ペア:

[(1, 20916080), (2, 10458040), (4, 5229020), (5, 4183216), (8, 2614510), (10, 2091608), (16, 1307255), (20, 1045804), (40, 522902), (80, 261451)]