18947368

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{1549}}^1$

素因数の和:1705

約数の個数: 32

約数和(自身を含む): 39060000

約数和(自身を除く): 20112632

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 139, 278, 556, 1112, 1529, 1549, 3058, 3098, 6116, 6196, 12232, 12392, 17039, 34078, 68156, 136312, 215311, 430622, 861244, 1722488, 2368421, 4736842, 9473684, 18947368]

約数ペア:

[(1, 18947368), (2, 9473684), (4, 4736842), (8, 2368421), (11, 1722488), (22, 861244), (44, 430622), (88, 215311), (139, 136312), (278, 68156), (556, 34078), (1112, 17039), (1529, 12392), (1549, 12232), (3058, 6196), (3098, 6116)]