20628027

素因数分解:

$3^5\times 7^1\times {\mathrm{67}}^1\times {\mathrm{181}}^1$

素因数の和:270

約数の個数: 48

約数和(自身を含む): 36038912

約数和(自身を除く): 15410885

約数列:

[1, 3, 7, 9, 21, 27, 63, 67, 81, 181, 189, 201, 243, 469, 543, 567, 603, 1267, 1407, 1629, 1701, 1809, 3801, 4221, 4887, 5427, 11403, 12127, 12663, 14661, 16281, 34209, 36381, 37989, 43983, 84889, 102627, 109143, 113967, 254667, 307881, 327429, 764001, 982287, 2292003, 2946861, 6876009, 20628027]

約数ペア:

[(1, 20628027), (3, 6876009), (7, 2946861), (9, 2292003), (21, 982287), (27, 764001), (63, 327429), (67, 307881), (81, 254667), (181, 113967), (189, 109143), (201, 102627), (243, 84889), (469, 43983), (543, 37989), (567, 36381), (603, 34209), (1267, 16281), (1407, 14661), (1629, 12663), (1701, 12127), (1809, 11403), (3801, 5427), (4221, 4887)]