20712960

素因数分解:

$2^9\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1$

素因数の和:89

約数の個数: 240

約数和(自身を含む): 76602240

約数和(自身を除く): 55889280

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 29, 30, 31, 32, 36, 40, 45, 48, 58, 60, 62, 64, 72, 80, 87, 90, 93, 96, 116, 120, 124, 128, 144, 145, 155, 160, 174, 180, 186, 192, 232, 240, 248, 256, 261, 279, 288, 290, 310, 320, 348, 360, 372, 384, 435, 464, 465, 480, 496, 512, 522, 558, 576, 580, 620, 640, 696, 720, 744, 768, 870, 899, 928, 930, 960, 992, 1044, 1116, 1152, 1160, 1240, 1280, 1305, 1392, 1395, 1440, 1488, 1536, 1740, 1798, 1856, 1860, 1920, 1984, 2088, 2232, 2304, 2320, 2480, 2560, 2610, 2697, 2784, 2790, 2880, 2976, 3480, 3596, 3712, 3720, 3840, 3968, 4176, 4464, 4495, 4608, 4640, 4960, 5220, 5394, 5568, 5580, 5760, 5952, 6960, 7192, 7424, 7440, 7680, 7936, 8091, 8352, 8928, 8990, 9280, 9920, 10440, 10788, 11136, 11160, 11520, 11904, 13485, 13920, 14384, 14848, 14880, 15872, 16182, 16704, 17856, 17980, 18560, 19840, 20880, 21576, 22272, 22320, 23040, 23808, 26970, 27840, 28768, 29760, 32364, 33408, 35712, 35960, 37120, 39680, 40455, 41760, 43152, 44544, 44640, 47616, 53940, 55680, 57536, 59520, 64728, 66816, 71424, 71920, 74240, 79360, 80910, 83520, 86304, 89280, 107880, 111360, 115072, 119040, 129456, 133632, 142848, 143840, 161820, 167040, 172608, 178560, 215760, 222720, 230144, 238080, 258912, 287680, 323640, 334080, 345216, 357120, 431520, 460288, 517824, 575360, 647280, 668160, 690432, 714240, 863040, 1035648, 1150720, 1294560, 1380864, 1726080, 2071296, 2301440, 2589120, 3452160, 4142592, 5178240, 6904320, 10356480, 20712960]

約数ペア:

[(1, 20712960), (2, 10356480), (3, 6904320), (4, 5178240), (5, 4142592), (6, 3452160), (8, 2589120), (9, 2301440), (10, 2071296), (12, 1726080), (15, 1380864), (16, 1294560), (18, 1150720), (20, 1035648), (24, 863040), (29, 714240), (30, 690432), (31, 668160), (32, 647280), (36, 575360), (40, 517824), (45, 460288), (48, 431520), (58, 357120), (60, 345216), (62, 334080), (64, 323640), (72, 287680), (80, 258912), (87, 238080), (90, 230144), (93, 222720), (96, 215760), (116, 178560), (120, 172608), (124, 167040), (128, 161820), (144, 143840), (145, 142848), (155, 133632), (160, 129456), (174, 119040), (180, 115072), (186, 111360), (192, 107880), (232, 89280), (240, 86304), (248, 83520), (256, 80910), (261, 79360), (279, 74240), (288, 71920), (290, 71424), (310, 66816), (320, 64728), (348, 59520), (360, 57536), (372, 55680), (384, 53940), (435, 47616), (464, 44640), (465, 44544), (480, 43152), (496, 41760), (512, 40455), (522, 39680), (558, 37120), (576, 35960), (580, 35712), (620, 33408), (640, 32364), (696, 29760), (720, 28768), (744, 27840), (768, 26970), (870, 23808), (899, 23040), (928, 22320), (930, 22272), (960, 21576), (992, 20880), (1044, 19840), (1116, 18560), (1152, 17980), (1160, 17856), (1240, 16704), (1280, 16182), (1305, 15872), (1392, 14880), (1395, 14848), (1440, 14384), (1488, 13920), (1536, 13485), (1740, 11904), (1798, 11520), (1856, 11160), (1860, 11136), (1920, 10788), (1984, 10440), (2088, 9920), (2232, 9280), (2304, 8990), (2320, 8928), (2480, 8352), (2560, 8091), (2610, 7936), (2697, 7680), (2784, 7440), (2790, 7424), (2880, 7192), (2976, 6960), (3480, 5952), (3596, 5760), (3712, 5580), (3720, 5568), (3840, 5394), (3968, 5220), (4176, 4960), (4464, 4640), (4495, 4608)]