21307810

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{30011}}^1$

素因数の和:30089

約数の個数: 16

約数和(自身を含む): 38895552

約数和(自身を除く): 17587742

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 30011, 60022, 150055, 300110, 2130781, 4261562, 10653905, 21307810]

約数ペア:

[(1, 21307810), (2, 10653905), (5, 4261562), (10, 2130781), (71, 300110), (142, 150055), (355, 60022), (710, 30011)]