20123009781

素因数分解:

$3^1\times 7^3\times {\mathrm{29}}^1\times {\mathrm{103}}^1\times {\mathrm{6547}}^1$

素因数の和:6703

約数の個数: 64

約数和(自身を含む): 32687616000

約数和(自身を除く): 12564606219

約数列:

[1, 3, 7, 21, 29, 49, 87, 103, 147, 203, 309, 343, 609, 721, 1029, 1421, 2163, 2987, 4263, 5047, 6547, 8961, 9947, 15141, 19641, 20909, 29841, 35329, 45829, 62727, 105987, 137487, 146363, 189863, 320803, 439089, 569589, 674341, 962409, 1024541, 1329041, 2023023, 2245621, 3073623, 3987123, 4720387, 6736863, 9303287, 14161161, 19555889, 27909861, 33042709, 58667667, 65123009, 99128127, 136891223, 195369027, 231298963, 410673669, 693896889, 958238561, 2874715683, 6707669927, 20123009781]

約数ペア:

[(1, 20123009781), (3, 6707669927), (7, 2874715683), (21, 958238561), (29, 693896889), (49, 410673669), (87, 231298963), (103, 195369027), (147, 136891223), (203, 99128127), (309, 65123009), (343, 58667667), (609, 33042709), (721, 27909861), (1029, 19555889), (1421, 14161161), (2163, 9303287), (2987, 6736863), (4263, 4720387), (5047, 3987123), (6547, 3073623), (8961, 2245621), (9947, 2023023), (15141, 1329041), (19641, 1024541), (20909, 962409), (29841, 674341), (35329, 569589), (45829, 439089), (62727, 320803), (105987, 189863), (137487, 146363)]