20405080

素因数分解:

$2^3\times 5^1\times {\mathrm{510127}}^1$

素因数の和:510138

約数の個数: 16

約数和(自身を含む): 45911520

約数和(自身を除く): 25506440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 510127, 1020254, 2040508, 2550635, 4081016, 5101270, 10202540, 20405080]

約数ペア:

[(1, 20405080), (2, 10202540), (4, 5101270), (5, 4081016), (8, 2550635), (10, 2040508), (20, 1020254), (40, 510127)]