19883905

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{709}}^1$

素因数の和:864

約数の個数: 16

約数和(自身を含む): 24537600

約数和(自身を除く): 4653695

約数列:

[1, 5, 71, 79, 355, 395, 709, 3545, 5609, 28045, 50339, 56011, 251695, 280055, 3976781, 19883905]

約数ペア:

[(1, 19883905), (5, 3976781), (71, 280055), (79, 251695), (355, 56011), (395, 50339), (709, 28045), (3545, 5609)]