18886978

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{20939}}^1$

素因数の和:20993

約数の個数: 16

約数和(自身を含む): 31661280

約数和(自身を除く): 12774302

約数列:

[1, 2, 11, 22, 41, 82, 451, 902, 20939, 41878, 230329, 460658, 858499, 1716998, 9443489, 18886978]

約数ペア:

[(1, 18886978), (2, 9443489), (11, 1716998), (22, 858499), (41, 460658), (82, 230329), (451, 41878), (902, 20939)]