21174979

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{1663}}^1$

素因数の和:1794

約数の個数: 16

約数和(自身を含む): 25878528

約数和(自身を除く): 4703549

約数列:

[1, 7, 17, 107, 119, 749, 1663, 1819, 11641, 12733, 28271, 177941, 197897, 1245587, 3024997, 21174979]

約数ペア:

[(1, 21174979), (7, 3024997), (17, 1245587), (107, 197897), (119, 177941), (749, 28271), (1663, 12733), (1819, 11641)]