21991743

素因数分解:

$3^6\times {\mathrm{97}}^1\times {\mathrm{311}}^1$

素因数の和:426

約数の個数: 28

約数和(自身を含む): 33419568

約数和(自身を除く): 11427825

約数列:

[1, 3, 9, 27, 81, 97, 243, 291, 311, 729, 873, 933, 2619, 2799, 7857, 8397, 23571, 25191, 30167, 70713, 75573, 90501, 226719, 271503, 814509, 2443527, 7330581, 21991743]

約数ペア:

[(1, 21991743), (3, 7330581), (9, 2443527), (27, 814509), (81, 271503), (97, 226719), (243, 90501), (291, 75573), (311, 70713), (729, 30167), (873, 25191), (933, 23571), (2619, 8397), (2799, 7857)]