20874380

素因数分解:

$2^2\times 5^1\times {\mathrm{661}}^1\times {\mathrm{1579}}^1$

素因数の和:2249

約数の個数: 24

約数和(自身を含む): 43930320

約数和(自身を除く): 23055940

約数列:

[1, 2, 4, 5, 10, 20, 661, 1322, 1579, 2644, 3158, 3305, 6316, 6610, 7895, 13220, 15790, 31580, 1043719, 2087438, 4174876, 5218595, 10437190, 20874380]

約数ペア:

[(1, 20874380), (2, 10437190), (4, 5218595), (5, 4174876), (10, 2087438), (20, 1043719), (661, 31580), (1322, 15790), (1579, 13220), (2644, 7895), (3158, 6610), (3305, 6316)]