20399645

素因数分解:

$5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{12401}}^1$

素因数の和:12460

約数の個数: 16

約数和(自身を含む): 28574208

約数和(自身を除く): 8174563

約数列:

[1, 5, 7, 35, 47, 235, 329, 1645, 12401, 62005, 86807, 434035, 582847, 2914235, 4079929, 20399645]

約数ペア:

[(1, 20399645), (5, 4079929), (7, 2914235), (35, 582847), (47, 434035), (235, 86807), (329, 62005), (1645, 12401)]