20781101440

素因数分解:

$2^7\times 5^1\times {\mathrm{11}}^2\times {\mathrm{127}}^1\times {\mathrm{2113}}^1$

素因数の和:2281

約数の個数: 192

約数和(自身を含む): 55062766080

約数和(自身を除く): 34281664640

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 121, 127, 128, 160, 176, 220, 242, 254, 320, 352, 440, 484, 508, 605, 635, 640, 704, 880, 968, 1016, 1210, 1270, 1397, 1408, 1760, 1936, 2032, 2113, 2420, 2540, 2794, 3520, 3872, 4064, 4226, 4840, 5080, 5588, 6985, 7040, 7744, 8128, 8452, 9680, 10160, 10565, 11176, 13970, 15367, 15488, 16256, 16904, 19360, 20320, 21130, 22352, 23243, 27940, 30734, 33808, 38720, 40640, 42260, 44704, 46486, 55880, 61468, 67616, 76835, 77440, 81280, 84520, 89408, 92972, 111760, 116215, 122936, 135232, 153670, 169040, 178816, 185944, 223520, 232430, 245872, 255673, 268351, 270464, 307340, 338080, 371888, 447040, 464860, 491744, 511346, 536702, 614680, 676160, 743776, 894080, 929720, 983488, 1022692, 1073404, 1229360, 1278365, 1341755, 1352320, 1487552, 1859440, 1966976, 2045384, 2146808, 2458720, 2556730, 2683510, 2951861, 2975104, 3718880, 4090768, 4293616, 4917440, 5113460, 5367020, 5903722, 7437760, 8181536, 8587232, 9834880, 10226920, 10734040, 11807444, 14759305, 14875520, 16363072, 17174464, 20453840, 21468080, 23614888, 29518610, 32470471, 32726144, 34348928, 40907680, 42936160, 47229776, 59037220, 64940942, 81815360, 85872320, 94459552, 118074440, 129881884, 162352355, 163630720, 171744640, 188919104, 236148880, 259763768, 324704710, 377838208, 472297760, 519527536, 649409420, 944595520, 1039055072, 1298818840, 1889191040, 2078110144, 2597637680, 4156220288, 5195275360, 10390550720, 20781101440]

約数ペア:

[(1, 20781101440), (2, 10390550720), (4, 5195275360), (5, 4156220288), (8, 2597637680), (10, 2078110144), (11, 1889191040), (16, 1298818840), (20, 1039055072), (22, 944595520), (32, 649409420), (40, 519527536), (44, 472297760), (55, 377838208), (64, 324704710), (80, 259763768), (88, 236148880), (110, 188919104), (121, 171744640), (127, 163630720), (128, 162352355), (160, 129881884), (176, 118074440), (220, 94459552), (242, 85872320), (254, 81815360), (320, 64940942), (352, 59037220), (440, 47229776), (484, 42936160), (508, 40907680), (605, 34348928), (635, 32726144), (640, 32470471), (704, 29518610), (880, 23614888), (968, 21468080), (1016, 20453840), (1210, 17174464), (1270, 16363072), (1397, 14875520), (1408, 14759305), (1760, 11807444), (1936, 10734040), (2032, 10226920), (2113, 9834880), (2420, 8587232), (2540, 8181536), (2794, 7437760), (3520, 5903722), (3872, 5367020), (4064, 5113460), (4226, 4917440), (4840, 4293616), (5080, 4090768), (5588, 3718880), (6985, 2975104), (7040, 2951861), (7744, 2683510), (8128, 2556730), (8452, 2458720), (9680, 2146808), (10160, 2045384), (10565, 1966976), (11176, 1859440), (13970, 1487552), (15367, 1352320), (15488, 1341755), (16256, 1278365), (16904, 1229360), (19360, 1073404), (20320, 1022692), (21130, 983488), (22352, 929720), (23243, 894080), (27940, 743776), (30734, 676160), (33808, 614680), (38720, 536702), (40640, 511346), (42260, 491744), (44704, 464860), (46486, 447040), (55880, 371888), (61468, 338080), (67616, 307340), (76835, 270464), (77440, 268351), (81280, 255673), (84520, 245872), (89408, 232430), (92972, 223520), (111760, 185944), (116215, 178816), (122936, 169040), (135232, 153670)]