21808085

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{2137}}^1$

素因数の和:2312

約数の個数: 16

約数和(自身を含む): 28375536

約数和(自身を除く): 6567451

約数列:

[1, 5, 13, 65, 157, 785, 2041, 2137, 10205, 10685, 27781, 138905, 335509, 1677545, 4361617, 21808085]

約数ペア:

[(1, 21808085), (5, 4361617), (13, 1677545), (65, 335509), (157, 138905), (785, 27781), (2041, 10685), (2137, 10205)]