20199778840

素因数分解:

$2^3\times 5^1\times {\mathrm{504994471}}^1$

素因数の和:504994482

約数の個数: 16

約数和(自身を含む): 45449502480

約数和(自身を除く): 25249723640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 504994471, 1009988942, 2019977884, 2524972355, 4039955768, 5049944710, 10099889420, 20199778840]

約数ペア:

[(1, 20199778840), (2, 10099889420), (4, 5049944710), (5, 4039955768), (8, 2524972355), (10, 2019977884), (20, 1009988942), (40, 504994471)]