21205114679

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{2053}}^1$

素因数の和:2220

約数の個数: 64

約数和(自身を含む): 27578154240

約数和(自身を除く): 6373039561

約数列:

[1, 7, 17, 29, 41, 73, 119, 203, 287, 493, 511, 697, 1189, 1241, 2053, 2117, 2993, 3451, 4879, 8323, 8687, 14371, 14819, 20213, 20951, 34901, 35989, 50881, 59537, 84173, 86797, 141491, 149869, 244307, 251923, 356167, 416759, 589211, 607579, 1012129, 1049083, 1430941, 1475549, 2441017, 2547773, 4346201, 6144629, 7084903, 10016587, 10328843, 17087119, 17834411, 30423407, 41497289, 43012403, 73885417, 104458693, 178194241, 290481023, 517197919, 731210851, 1247359687, 3029302097, 21205114679]

約数ペア:

[(1, 21205114679), (7, 3029302097), (17, 1247359687), (29, 731210851), (41, 517197919), (73, 290481023), (119, 178194241), (203, 104458693), (287, 73885417), (493, 43012403), (511, 41497289), (697, 30423407), (1189, 17834411), (1241, 17087119), (2053, 10328843), (2117, 10016587), (2993, 7084903), (3451, 6144629), (4879, 4346201), (8323, 2547773), (8687, 2441017), (14371, 1475549), (14819, 1430941), (20213, 1049083), (20951, 1012129), (34901, 607579), (35989, 589211), (50881, 416759), (59537, 356167), (84173, 251923), (86797, 244307), (141491, 149869)]