20156787

素因数分解:

$3^2\times 7^2\times {\mathrm{45707}}^1$

素因数の和:45727

約数の個数: 18

約数和(自身を含む): 33869628

約数和(自身を除く): 13712841

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 45707, 137121, 319949, 411363, 959847, 2239643, 2879541, 6718929, 20156787]

約数ペア:

[(1, 20156787), (3, 6718929), (7, 2879541), (9, 2239643), (21, 959847), (49, 411363), (63, 319949), (147, 137121), (441, 45707)]