20747991

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{61}}^1\times {\mathrm{937}}^1$

素因数の和:1023

約数の個数: 24

約数和(自身を含む): 30938992

約数和(自身を除く): 10191001

約数列:

[1, 3, 11, 33, 61, 121, 183, 363, 671, 937, 2013, 2811, 7381, 10307, 22143, 30921, 57157, 113377, 171471, 340131, 628727, 1886181, 6915997, 20747991]

約数ペア:

[(1, 20747991), (3, 6915997), (11, 1886181), (33, 628727), (61, 340131), (121, 171471), (183, 113377), (363, 57157), (671, 30921), (937, 22143), (2013, 10307), (2811, 7381)]