19990047

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{7867}}^1$

素因数の和:7899

約数の個数: 24

約数和(自身を含む): 33486208

約数和(自身を除く): 13496161

約数列:

[1, 3, 7, 11, 21, 33, 77, 121, 231, 363, 847, 2541, 7867, 23601, 55069, 86537, 165207, 259611, 605759, 951907, 1817277, 2855721, 6663349, 19990047]

約数ペア:

[(1, 19990047), (3, 6663349), (7, 2855721), (11, 1817277), (21, 951907), (33, 605759), (77, 259611), (121, 165207), (231, 86537), (363, 55069), (847, 23601), (2541, 7867)]