256917760

素因数分解:

$2^8\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{257}}^1$

素因数の和:360

約数の個数: 144

約数和(自身を含む): 683448192

約数和(自身を除く): 426530432

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 71, 80, 88, 110, 128, 142, 160, 176, 220, 256, 257, 284, 320, 352, 355, 440, 514, 568, 640, 704, 710, 781, 880, 1028, 1136, 1280, 1285, 1408, 1420, 1562, 1760, 2056, 2272, 2570, 2816, 2827, 2840, 3124, 3520, 3905, 4112, 4544, 5140, 5654, 5680, 6248, 7040, 7810, 8224, 9088, 10280, 11308, 11360, 12496, 14080, 14135, 15620, 16448, 18176, 18247, 20560, 22616, 22720, 24992, 28270, 31240, 32896, 36494, 41120, 45232, 45440, 49984, 56540, 62480, 65792, 72988, 82240, 90464, 90880, 91235, 99968, 113080, 124960, 145976, 164480, 180928, 182470, 199936, 200717, 226160, 249920, 291952, 328960, 361856, 364940, 401434, 452320, 499840, 583904, 723712, 729880, 802868, 904640, 999680, 1003585, 1167808, 1459760, 1605736, 1809280, 2007170, 2335616, 2919520, 3211472, 3618560, 4014340, 4671232, 5839040, 6422944, 8028680, 11678080, 12845888, 16057360, 23356160, 25691776, 32114720, 51383552, 64229440, 128458880, 256917760]

約数ペア:

[(1, 256917760), (2, 128458880), (4, 64229440), (5, 51383552), (8, 32114720), (10, 25691776), (11, 23356160), (16, 16057360), (20, 12845888), (22, 11678080), (32, 8028680), (40, 6422944), (44, 5839040), (55, 4671232), (64, 4014340), (71, 3618560), (80, 3211472), (88, 2919520), (110, 2335616), (128, 2007170), (142, 1809280), (160, 1605736), (176, 1459760), (220, 1167808), (256, 1003585), (257, 999680), (284, 904640), (320, 802868), (352, 729880), (355, 723712), (440, 583904), (514, 499840), (568, 452320), (640, 401434), (704, 364940), (710, 361856), (781, 328960), (880, 291952), (1028, 249920), (1136, 226160), (1280, 200717), (1285, 199936), (1408, 182470), (1420, 180928), (1562, 164480), (1760, 145976), (2056, 124960), (2272, 113080), (2570, 99968), (2816, 91235), (2827, 90880), (2840, 90464), (3124, 82240), (3520, 72988), (3905, 65792), (4112, 62480), (4544, 56540), (5140, 49984), (5654, 45440), (5680, 45232), (6248, 41120), (7040, 36494), (7810, 32896), (8224, 31240), (9088, 28270), (10280, 24992), (11308, 22720), (11360, 22616), (12496, 20560), (14080, 18247), (14135, 18176), (15620, 16448)]