428571

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1$

素因数の和:73

約数の個数: 40

約数和(自身を含む): 772464

約数和(自身を除く): 343893

約数列:

[1, 3, 9, 11, 13, 27, 33, 37, 39, 81, 99, 111, 117, 143, 297, 333, 351, 407, 429, 481, 891, 999, 1053, 1221, 1287, 1443, 2997, 3663, 3861, 4329, 5291, 10989, 11583, 12987, 15873, 32967, 38961, 47619, 142857, 428571]

約数ペア:

[(1, 428571), (3, 142857), (9, 47619), (11, 38961), (13, 32967), (27, 15873), (33, 12987), (37, 11583), (39, 10989), (81, 5291), (99, 4329), (111, 3861), (117, 3663), (143, 2997), (297, 1443), (333, 1287), (351, 1221), (407, 1053), (429, 999), (481, 891)]