20642540

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{14537}}^1$

素因数の和:14617

約数の個数: 24

約数和(自身を含む): 43962912

約数和(自身を除く): 23320372

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 14537, 29074, 58148, 72685, 145370, 290740, 1032127, 2064254, 4128508, 5160635, 10321270, 20642540]

約数ペア:

[(1, 20642540), (2, 10321270), (4, 5160635), (5, 4128508), (10, 2064254), (20, 1032127), (71, 290740), (142, 145370), (284, 72685), (355, 58148), (710, 29074), (1420, 14537)]