21238287

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{1451}}^1$

素因数の和:1519

約数の個数: 32

約数和(自身を含む): 35126784

約数和(自身を除く): 13888497

約数列:

[1, 3, 7, 17, 21, 41, 51, 119, 123, 287, 357, 697, 861, 1451, 2091, 4353, 4879, 10157, 14637, 24667, 30471, 59491, 74001, 172669, 178473, 416437, 518007, 1011347, 1249311, 3034041, 7079429, 21238287]

約数ペア:

[(1, 21238287), (3, 7079429), (7, 3034041), (17, 1249311), (21, 1011347), (41, 518007), (51, 416437), (119, 178473), (123, 172669), (287, 74001), (357, 59491), (697, 30471), (861, 24667), (1451, 14637), (2091, 10157), (4353, 4879)]