20816080

素因数分解:

$2^4\times 5^1\times {\mathrm{260201}}^1$

素因数の和:260214

約数の個数: 20

約数和(自身を含む): 48397572

約数和(自身を除く): 27581492

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 260201, 520402, 1040804, 1301005, 2081608, 2602010, 4163216, 5204020, 10408040, 20816080]

約数ペア:

[(1, 20816080), (2, 10408040), (4, 5204020), (5, 4163216), (8, 2602010), (10, 2081608), (16, 1301005), (20, 1040804), (40, 520402), (80, 260201)]