20199781

素因数分解:

$7^1\times {\mathrm{107}}^1\times {\mathrm{149}}^1\times {\mathrm{181}}^1$

素因数の和:444

約数の個数: 16

約数和(自身を含む): 23587200

約数和(自身を除く): 3387419

約数列:

[1, 7, 107, 149, 181, 749, 1043, 1267, 15943, 19367, 26969, 111601, 135569, 188783, 2885683, 20199781]

約数ペア:

[(1, 20199781), (7, 2885683), (107, 188783), (149, 135569), (181, 111601), (749, 26969), (1043, 19367), (1267, 15943)]