20993908

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{403729}}^1$

素因数の和:403746

約数の個数: 12

約数和(自身を含む): 39565540

約数和(自身を除く): 18571632

約数列:

[1, 2, 4, 13, 26, 52, 403729, 807458, 1614916, 5248477, 10496954, 20993908]

約数ペア:

[(1, 20993908), (2, 10496954), (4, 5248477), (13, 1614916), (26, 807458), (52, 403729)]