21129493

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{4651}}^1$

素因数の和:4728

約数の個数: 16

約数和(自身を含む): 26795520

約数和(自身を除く): 5666027

約数列:

[1, 7, 11, 59, 77, 413, 649, 4543, 4651, 32557, 51161, 274409, 358127, 1920863, 3018499, 21129493]

約数ペア:

[(1, 21129493), (7, 3018499), (11, 1920863), (59, 358127), (77, 274409), (413, 51161), (649, 32557), (4543, 4651)]