21820071

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{311}}^1$

素因数の和:591

約数の個数: 32

約数和(自身を含む): 36062208

約数和(自身を除く): 14242137

約数列:

[1, 3, 7, 13, 21, 39, 91, 257, 273, 311, 771, 933, 1799, 2177, 3341, 4043, 5397, 6531, 10023, 12129, 23387, 28301, 70161, 79927, 84903, 239781, 559489, 1039051, 1678467, 3117153, 7273357, 21820071]

約数ペア:

[(1, 21820071), (3, 7273357), (7, 3117153), (13, 1678467), (21, 1039051), (39, 559489), (91, 239781), (257, 84903), (273, 79927), (311, 70161), (771, 28301), (933, 23387), (1799, 12129), (2177, 10023), (3341, 6531), (4043, 5397)]