1645404761

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^2\times {\mathrm{127}}^1$

素因数の和:251

約数の個数: 72

約数和(自身を含む): 2320303104

約数和(自身を除く): 674898343

約数列:

[1, 7, 11, 13, 43, 49, 77, 91, 127, 143, 301, 473, 539, 559, 637, 889, 1001, 1397, 1651, 1849, 2107, 3311, 3913, 5461, 6149, 6223, 7007, 9779, 11557, 12943, 18161, 20339, 23177, 24037, 27391, 38227, 43043, 60071, 68453, 70993, 80899, 90601, 127127, 142373, 168259, 234823, 264407, 267589, 301301, 420497, 496951, 780923, 889889, 996611, 1177813, 1643761, 1850849, 2583053, 2943479, 3052699, 3478657, 5466461, 11506327, 12955943, 18081371, 21368893, 33579689, 38265227, 126569597, 149582251, 235057823, 1645404761]

約数ペア:

[(1, 1645404761), (7, 235057823), (11, 149582251), (13, 126569597), (43, 38265227), (49, 33579689), (77, 21368893), (91, 18081371), (127, 12955943), (143, 11506327), (301, 5466461), (473, 3478657), (539, 3052699), (559, 2943479), (637, 2583053), (889, 1850849), (1001, 1643761), (1397, 1177813), (1651, 996611), (1849, 889889), (2107, 780923), (3311, 496951), (3913, 420497), (5461, 301301), (6149, 267589), (6223, 264407), (7007, 234823), (9779, 168259), (11557, 142373), (12943, 127127), (18161, 90601), (20339, 80899), (23177, 70993), (24037, 68453), (27391, 60071), (38227, 43043)]