19972953

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{739}}^1$

素因数の和:779

約数の個数: 64

約数和(自身を含む): 39782400

約数和(自身を除く): 19809447

約数列:

[1, 3, 7, 9, 11, 13, 21, 27, 33, 39, 63, 77, 91, 99, 117, 143, 189, 231, 273, 297, 351, 429, 693, 739, 819, 1001, 1287, 2079, 2217, 2457, 3003, 3861, 5173, 6651, 8129, 9009, 9607, 15519, 19953, 24387, 27027, 28821, 46557, 56903, 67249, 73161, 86463, 105677, 139671, 170709, 201747, 219483, 259389, 317031, 512127, 605241, 739739, 951093, 1536381, 1815723, 2219217, 2853279, 6657651, 19972953]

約数ペア:

[(1, 19972953), (3, 6657651), (7, 2853279), (9, 2219217), (11, 1815723), (13, 1536381), (21, 951093), (27, 739739), (33, 605241), (39, 512127), (63, 317031), (77, 259389), (91, 219483), (99, 201747), (117, 170709), (143, 139671), (189, 105677), (231, 86463), (273, 73161), (297, 67249), (351, 56903), (429, 46557), (693, 28821), (739, 27027), (819, 24387), (1001, 19953), (1287, 15519), (2079, 9607), (2217, 9009), (2457, 8129), (3003, 6651), (3861, 5173)]