20981479680

素因数分解:

$2^8\times 3^3\times 5^1\times 7^1\times {\mathrm{86729}}^1$

素因数の和:86766

約数の個数: 288

約数和(自身を含む): 85092537600

約数和(自身を除く): 64111057920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 27, 28, 30, 32, 35, 36, 40, 42, 45, 48, 54, 56, 60, 63, 64, 70, 72, 80, 84, 90, 96, 105, 108, 112, 120, 126, 128, 135, 140, 144, 160, 168, 180, 189, 192, 210, 216, 224, 240, 252, 256, 270, 280, 288, 315, 320, 336, 360, 378, 384, 420, 432, 448, 480, 504, 540, 560, 576, 630, 640, 672, 720, 756, 768, 840, 864, 896, 945, 960, 1008, 1080, 1120, 1152, 1260, 1280, 1344, 1440, 1512, 1680, 1728, 1792, 1890, 1920, 2016, 2160, 2240, 2304, 2520, 2688, 2880, 3024, 3360, 3456, 3780, 3840, 4032, 4320, 4480, 5040, 5376, 5760, 6048, 6720, 6912, 7560, 8064, 8640, 8960, 10080, 11520, 12096, 13440, 15120, 16128, 17280, 20160, 24192, 26880, 30240, 34560, 40320, 48384, 60480, 80640, 86729, 120960, 173458, 241920, 260187, 346916, 433645, 520374, 607103, 693832, 780561, 867290, 1040748, 1214206, 1300935, 1387664, 1561122, 1734580, 1821309, 2081496, 2341683, 2428412, 2601870, 2775328, 3035515, 3122244, 3469160, 3642618, 3902805, 4162992, 4683366, 4856824, 5203740, 5463927, 5550656, 6071030, 6244488, 6938320, 7285236, 7805610, 8325984, 9106545, 9366732, 9713648, 10407480, 10927854, 11101312, 11708415, 12142060, 12488976, 13876640, 14570472, 15611220, 16391781, 16651968, 18213090, 18733464, 19427296, 20814960, 21855708, 22202624, 23416830, 24284120, 24977952, 27319635, 27753280, 29140944, 31222440, 32783562, 33303936, 36426180, 37466928, 38854592, 41629920, 43711416, 46833660, 48568240, 49955904, 54639270, 55506560, 58281888, 62444880, 65567124, 66607872, 72852360, 74933856, 77709184, 81958905, 83259840, 87422832, 93667320, 97136480, 99911808, 109278540, 111013120, 116563776, 124889760, 131134248, 145704720, 149867712, 155418368, 163917810, 166519680, 174845664, 187334640, 194272960, 199823616, 218557080, 233127552, 249779520, 262268496, 291409440, 299735424, 327835620, 333039360, 349691328, 374669280, 388545920, 437114160, 466255104, 499559040, 524536992, 582818880, 599470848, 655671240, 699382656, 749338560, 777091840, 874228320, 999118080, 1049073984, 1165637760, 1311342480, 1398765312, 1498677120, 1748456640, 2098147968, 2331275520, 2622684960, 2997354240, 3496913280, 4196295936, 5245369920, 6993826560, 10490739840, 20981479680]

約数ペア:

[(1, 20981479680), (2, 10490739840), (3, 6993826560), (4, 5245369920), (5, 4196295936), (6, 3496913280), (7, 2997354240), (8, 2622684960), (9, 2331275520), (10, 2098147968), (12, 1748456640), (14, 1498677120), (15, 1398765312), (16, 1311342480), (18, 1165637760), (20, 1049073984), (21, 999118080), (24, 874228320), (27, 777091840), (28, 749338560), (30, 699382656), (32, 655671240), (35, 599470848), (36, 582818880), (40, 524536992), (42, 499559040), (45, 466255104), (48, 437114160), (54, 388545920), (56, 374669280), (60, 349691328), (63, 333039360), (64, 327835620), (70, 299735424), (72, 291409440), (80, 262268496), (84, 249779520), (90, 233127552), (96, 218557080), (105, 199823616), (108, 194272960), (112, 187334640), (120, 174845664), (126, 166519680), (128, 163917810), (135, 155418368), (140, 149867712), (144, 145704720), (160, 131134248), (168, 124889760), (180, 116563776), (189, 111013120), (192, 109278540), (210, 99911808), (216, 97136480), (224, 93667320), (240, 87422832), (252, 83259840), (256, 81958905), (270, 77709184), (280, 74933856), (288, 72852360), (315, 66607872), (320, 65567124), (336, 62444880), (360, 58281888), (378, 55506560), (384, 54639270), (420, 49955904), (432, 48568240), (448, 46833660), (480, 43711416), (504, 41629920), (540, 38854592), (560, 37466928), (576, 36426180), (630, 33303936), (640, 32783562), (672, 31222440), (720, 29140944), (756, 27753280), (768, 27319635), (840, 24977952), (864, 24284120), (896, 23416830), (945, 22202624), (960, 21855708), (1008, 20814960), (1080, 19427296), (1120, 18733464), (1152, 18213090), (1260, 16651968), (1280, 16391781), (1344, 15611220), (1440, 14570472), (1512, 13876640), (1680, 12488976), (1728, 12142060), (1792, 11708415), (1890, 11101312), (1920, 10927854), (2016, 10407480), (2160, 9713648), (2240, 9366732), (2304, 9106545), (2520, 8325984), (2688, 7805610), (2880, 7285236), (3024, 6938320), (3360, 6244488), (3456, 6071030), (3780, 5550656), (3840, 5463927), (4032, 5203740), (4320, 4856824), (4480, 4683366), (5040, 4162992), (5376, 3902805), (5760, 3642618), (6048, 3469160), (6720, 3122244), (6912, 3035515), (7560, 2775328), (8064, 2601870), (8640, 2428412), (8960, 2341683), (10080, 2081496), (11520, 1821309), (12096, 1734580), (13440, 1561122), (15120, 1387664), (16128, 1300935), (17280, 1214206), (20160, 1040748), (24192, 867290), (26880, 780561), (30240, 693832), (34560, 607103), (40320, 520374), (48384, 433645), (60480, 346916), (80640, 260187), (86729, 241920), (120960, 173458)]