20391111

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{397}}^1\times {\mathrm{439}}^1$

素因数の和:855

約数の個数: 24

約数和(自身を含む): 31871840

約数和(自身を除く): 11480729

約数列:

[1, 3, 9, 13, 39, 117, 397, 439, 1191, 1317, 3573, 3951, 5161, 5707, 15483, 17121, 46449, 51363, 174283, 522849, 1568547, 2265679, 6797037, 20391111]

約数ペア:

[(1, 20391111), (3, 6797037), (9, 2265679), (13, 1568547), (39, 522849), (117, 174283), (397, 51363), (439, 46449), (1191, 17121), (1317, 15483), (3573, 5707), (3951, 5161)]