19908905

素因数分解:

$5^1\times {\mathrm{113}}^1\times {\mathrm{167}}^1\times {\mathrm{211}}^1$

素因数の和:496

約数の個数: 16

約数和(自身を含む): 24361344

約数和(自身を除く): 4452439

約数列:

[1, 5, 113, 167, 211, 565, 835, 1055, 18871, 23843, 35237, 94355, 119215, 176185, 3981781, 19908905]

約数ペア:

[(1, 19908905), (5, 3981781), (113, 176185), (167, 119215), (211, 94355), (565, 35237), (835, 23843), (1055, 18871)]