256983840

素因数分解:

$2^5\times 3^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{251}}^1$

素因数の和:357

約数の個数: 240

約数和(自身を含む): 922078080

約数和(自身を除く): 665094240

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 32, 36, 40, 45, 48, 54, 60, 72, 79, 80, 81, 90, 96, 108, 120, 135, 144, 158, 160, 162, 180, 216, 237, 240, 251, 270, 288, 316, 324, 360, 395, 405, 432, 474, 480, 502, 540, 632, 648, 711, 720, 753, 790, 810, 864, 948, 1004, 1080, 1185, 1255, 1264, 1296, 1422, 1440, 1506, 1580, 1620, 1896, 2008, 2133, 2160, 2259, 2370, 2510, 2528, 2592, 2844, 3012, 3160, 3240, 3555, 3765, 3792, 4016, 4266, 4320, 4518, 4740, 5020, 5688, 6024, 6320, 6399, 6480, 6777, 7110, 7530, 7584, 8032, 8532, 9036, 9480, 10040, 10665, 11295, 11376, 12048, 12640, 12798, 12960, 13554, 14220, 15060, 17064, 18072, 18960, 19829, 20080, 20331, 21330, 22590, 22752, 24096, 25596, 27108, 28440, 30120, 31995, 33885, 34128, 36144, 37920, 39658, 40160, 40662, 42660, 45180, 51192, 54216, 56880, 59487, 60240, 63990, 67770, 68256, 72288, 79316, 81324, 85320, 90360, 99145, 101655, 102384, 108432, 113760, 118974, 120480, 127980, 135540, 158632, 162648, 170640, 178461, 180720, 198290, 203310, 204768, 216864, 237948, 255960, 271080, 297435, 317264, 325296, 341280, 356922, 361440, 396580, 406620, 475896, 511920, 535383, 542160, 594870, 634528, 650592, 713844, 793160, 813240, 892305, 951792, 1023840, 1070766, 1084320, 1189740, 1427688, 1586320, 1606149, 1626480, 1784610, 1903584, 2141532, 2379480, 2676915, 2855376, 3172640, 3212298, 3252960, 3569220, 4283064, 4758960, 5353830, 5710752, 6424596, 7138440, 8030745, 8566128, 9517920, 10707660, 12849192, 14276880, 16061490, 17132256, 21415320, 25698384, 28553760, 32122980, 42830640, 51396768, 64245960, 85661280, 128491920, 256983840]

約数ペア:

[(1, 256983840), (2, 128491920), (3, 85661280), (4, 64245960), (5, 51396768), (6, 42830640), (8, 32122980), (9, 28553760), (10, 25698384), (12, 21415320), (15, 17132256), (16, 16061490), (18, 14276880), (20, 12849192), (24, 10707660), (27, 9517920), (30, 8566128), (32, 8030745), (36, 7138440), (40, 6424596), (45, 5710752), (48, 5353830), (54, 4758960), (60, 4283064), (72, 3569220), (79, 3252960), (80, 3212298), (81, 3172640), (90, 2855376), (96, 2676915), (108, 2379480), (120, 2141532), (135, 1903584), (144, 1784610), (158, 1626480), (160, 1606149), (162, 1586320), (180, 1427688), (216, 1189740), (237, 1084320), (240, 1070766), (251, 1023840), (270, 951792), (288, 892305), (316, 813240), (324, 793160), (360, 713844), (395, 650592), (405, 634528), (432, 594870), (474, 542160), (480, 535383), (502, 511920), (540, 475896), (632, 406620), (648, 396580), (711, 361440), (720, 356922), (753, 341280), (790, 325296), (810, 317264), (864, 297435), (948, 271080), (1004, 255960), (1080, 237948), (1185, 216864), (1255, 204768), (1264, 203310), (1296, 198290), (1422, 180720), (1440, 178461), (1506, 170640), (1580, 162648), (1620, 158632), (1896, 135540), (2008, 127980), (2133, 120480), (2160, 118974), (2259, 113760), (2370, 108432), (2510, 102384), (2528, 101655), (2592, 99145), (2844, 90360), (3012, 85320), (3160, 81324), (3240, 79316), (3555, 72288), (3765, 68256), (3792, 67770), (4016, 63990), (4266, 60240), (4320, 59487), (4518, 56880), (4740, 54216), (5020, 51192), (5688, 45180), (6024, 42660), (6320, 40662), (6399, 40160), (6480, 39658), (6777, 37920), (7110, 36144), (7530, 34128), (7584, 33885), (8032, 31995), (8532, 30120), (9036, 28440), (9480, 27108), (10040, 25596), (10665, 24096), (11295, 22752), (11376, 22590), (12048, 21330), (12640, 20331), (12798, 20080), (12960, 19829), (13554, 18960), (14220, 18072), (15060, 17064)]