81319680

素因数分解:

$2^8\times 3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{181}}^1$

素因数の和:224

約数の個数: 288

約数和(自身を含む): 312486720

約数和(自身を除く): 231167040

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16, 18, 20, 24, 26, 27, 30, 32, 36, 39, 40, 45, 48, 52, 54, 60, 64, 65, 72, 78, 80, 90, 96, 104, 108, 117, 120, 128, 130, 135, 144, 156, 160, 180, 181, 192, 195, 208, 216, 234, 240, 256, 260, 270, 288, 312, 320, 351, 360, 362, 384, 390, 416, 432, 468, 480, 520, 540, 543, 576, 585, 624, 640, 702, 720, 724, 768, 780, 832, 864, 905, 936, 960, 1040, 1080, 1086, 1152, 1170, 1248, 1280, 1404, 1440, 1448, 1560, 1629, 1664, 1728, 1755, 1810, 1872, 1920, 2080, 2160, 2172, 2304, 2340, 2353, 2496, 2715, 2808, 2880, 2896, 3120, 3258, 3328, 3456, 3510, 3620, 3744, 3840, 4160, 4320, 4344, 4680, 4706, 4887, 4992, 5430, 5616, 5760, 5792, 6240, 6516, 6912, 7020, 7059, 7240, 7488, 8145, 8320, 8640, 8688, 9360, 9412, 9774, 9984, 10860, 11232, 11520, 11584, 11765, 12480, 13032, 14040, 14118, 14480, 14976, 16290, 16640, 17280, 17376, 18720, 18824, 19548, 21177, 21720, 22464, 23168, 23530, 24435, 24960, 26064, 28080, 28236, 28960, 29952, 32580, 34560, 34752, 35295, 37440, 37648, 39096, 42354, 43440, 44928, 46336, 47060, 48870, 49920, 52128, 56160, 56472, 57920, 63531, 65160, 69504, 70590, 74880, 75296, 78192, 84708, 86880, 89856, 94120, 97740, 104256, 105885, 112320, 112944, 115840, 127062, 130320, 139008, 141180, 149760, 150592, 156384, 169416, 173760, 188240, 195480, 208512, 211770, 224640, 225888, 231680, 254124, 260640, 282360, 301184, 312768, 317655, 338832, 347520, 376480, 390960, 417024, 423540, 449280, 451776, 508248, 521280, 564720, 602368, 625536, 635310, 677664, 695040, 752960, 781920, 847080, 903552, 1016496, 1042560, 1129440, 1251072, 1270620, 1355328, 1505920, 1563840, 1694160, 1807104, 2032992, 2085120, 2258880, 2541240, 2710656, 3011840, 3127680, 3388320, 4065984, 4517760, 5082480, 5421312, 6255360, 6776640, 8131968, 9035520, 10164960, 13553280, 16263936, 20329920, 27106560, 40659840, 81319680]

約数ペア:

[(1, 81319680), (2, 40659840), (3, 27106560), (4, 20329920), (5, 16263936), (6, 13553280), (8, 10164960), (9, 9035520), (10, 8131968), (12, 6776640), (13, 6255360), (15, 5421312), (16, 5082480), (18, 4517760), (20, 4065984), (24, 3388320), (26, 3127680), (27, 3011840), (30, 2710656), (32, 2541240), (36, 2258880), (39, 2085120), (40, 2032992), (45, 1807104), (48, 1694160), (52, 1563840), (54, 1505920), (60, 1355328), (64, 1270620), (65, 1251072), (72, 1129440), (78, 1042560), (80, 1016496), (90, 903552), (96, 847080), (104, 781920), (108, 752960), (117, 695040), (120, 677664), (128, 635310), (130, 625536), (135, 602368), (144, 564720), (156, 521280), (160, 508248), (180, 451776), (181, 449280), (192, 423540), (195, 417024), (208, 390960), (216, 376480), (234, 347520), (240, 338832), (256, 317655), (260, 312768), (270, 301184), (288, 282360), (312, 260640), (320, 254124), (351, 231680), (360, 225888), (362, 224640), (384, 211770), (390, 208512), (416, 195480), (432, 188240), (468, 173760), (480, 169416), (520, 156384), (540, 150592), (543, 149760), (576, 141180), (585, 139008), (624, 130320), (640, 127062), (702, 115840), (720, 112944), (724, 112320), (768, 105885), (780, 104256), (832, 97740), (864, 94120), (905, 89856), (936, 86880), (960, 84708), (1040, 78192), (1080, 75296), (1086, 74880), (1152, 70590), (1170, 69504), (1248, 65160), (1280, 63531), (1404, 57920), (1440, 56472), (1448, 56160), (1560, 52128), (1629, 49920), (1664, 48870), (1728, 47060), (1755, 46336), (1810, 44928), (1872, 43440), (1920, 42354), (2080, 39096), (2160, 37648), (2172, 37440), (2304, 35295), (2340, 34752), (2353, 34560), (2496, 32580), (2715, 29952), (2808, 28960), (2880, 28236), (2896, 28080), (3120, 26064), (3258, 24960), (3328, 24435), (3456, 23530), (3510, 23168), (3620, 22464), (3744, 21720), (3840, 21177), (4160, 19548), (4320, 18824), (4344, 18720), (4680, 17376), (4706, 17280), (4887, 16640), (4992, 16290), (5430, 14976), (5616, 14480), (5760, 14118), (5792, 14040), (6240, 13032), (6516, 12480), (6912, 11765), (7020, 11584), (7059, 11520), (7240, 11232), (7488, 10860), (8145, 9984), (8320, 9774), (8640, 9412), (8688, 9360)]