21805623

素因数分解:

$3^2\times 7^1\times {\mathrm{89}}^1\times {\mathrm{3889}}^1$

素因数の和:3991

約数の個数: 24

約数和(自身を含む): 36410400

約数和(自身を除く): 14604777

約数列:

[1, 3, 7, 9, 21, 63, 89, 267, 623, 801, 1869, 3889, 5607, 11667, 27223, 35001, 81669, 245007, 346121, 1038363, 2422847, 3115089, 7268541, 21805623]

約数ペア:

[(1, 21805623), (3, 7268541), (7, 3115089), (9, 2422847), (21, 1038363), (63, 346121), (89, 245007), (267, 81669), (623, 35001), (801, 27223), (1869, 11667), (3889, 5607)]