20400205

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{30677}}^1$

素因数の和:30708

約数の個数: 16

約数和(自身を含む): 29450880

約数和(自身を除く): 9050675

約数列:

[1, 5, 7, 19, 35, 95, 133, 665, 30677, 153385, 214739, 582863, 1073695, 2914315, 4080041, 20400205]

約数ペア:

[(1, 20400205), (5, 4080041), (7, 2914315), (19, 1073695), (35, 582863), (95, 214739), (133, 153385), (665, 30677)]