18808212980

素因数分解:

$2^2\times 5^1\times {\mathrm{661}}^1\times {\mathrm{1422709}}^1$

素因数の和:1423379

約数の個数: 24

約数和(自身を含む): 39557028840

約数和(自身を除く): 20748815860

約数列:

[1, 2, 4, 5, 10, 20, 661, 1322, 2644, 3305, 6610, 13220, 1422709, 2845418, 5690836, 7113545, 14227090, 28454180, 940410649, 1880821298, 3761642596, 4702053245, 9404106490, 18808212980]

約数ペア:

[(1, 18808212980), (2, 9404106490), (4, 4702053245), (5, 3761642596), (10, 1880821298), (20, 940410649), (661, 28454180), (1322, 14227090), (2644, 7113545), (3305, 5690836), (6610, 2845418), (13220, 1422709)]