81123840

素因数分解:

$2^9\times 3^2\times 5^1\times 7^1\times {\mathrm{503}}^1$

素因数の和:539

約数の個数: 240

約数和(自身を含む): 321729408

約数和(自身を除く): 240605568

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 32, 35, 36, 40, 42, 45, 48, 56, 60, 63, 64, 70, 72, 80, 84, 90, 96, 105, 112, 120, 126, 128, 140, 144, 160, 168, 180, 192, 210, 224, 240, 252, 256, 280, 288, 315, 320, 336, 360, 384, 420, 448, 480, 503, 504, 512, 560, 576, 630, 640, 672, 720, 768, 840, 896, 960, 1006, 1008, 1120, 1152, 1260, 1280, 1344, 1440, 1509, 1536, 1680, 1792, 1920, 2012, 2016, 2240, 2304, 2515, 2520, 2560, 2688, 2880, 3018, 3360, 3521, 3584, 3840, 4024, 4032, 4480, 4527, 4608, 5030, 5040, 5376, 5760, 6036, 6720, 7042, 7545, 7680, 8048, 8064, 8960, 9054, 10060, 10080, 10563, 10752, 11520, 12072, 13440, 14084, 15090, 16096, 16128, 17605, 17920, 18108, 20120, 20160, 21126, 22635, 23040, 24144, 26880, 28168, 30180, 31689, 32192, 32256, 35210, 36216, 40240, 40320, 42252, 45270, 48288, 52815, 53760, 56336, 60360, 63378, 64384, 70420, 72432, 80480, 80640, 84504, 90540, 96576, 105630, 112672, 120720, 126756, 128768, 140840, 144864, 158445, 160960, 161280, 169008, 181080, 193152, 211260, 225344, 241440, 253512, 257536, 281680, 289728, 316890, 321920, 338016, 362160, 386304, 422520, 450688, 482880, 507024, 563360, 579456, 633780, 643840, 676032, 724320, 772608, 845040, 901376, 965760, 1014048, 1126720, 1158912, 1267560, 1287680, 1352064, 1448640, 1690080, 1802752, 1931520, 2028096, 2253440, 2317824, 2535120, 2704128, 2897280, 3380160, 3863040, 4056192, 4506880, 5070240, 5408256, 5794560, 6760320, 8112384, 9013760, 10140480, 11589120, 13520640, 16224768, 20280960, 27041280, 40561920, 81123840]

約数ペア:

[(1, 81123840), (2, 40561920), (3, 27041280), (4, 20280960), (5, 16224768), (6, 13520640), (7, 11589120), (8, 10140480), (9, 9013760), (10, 8112384), (12, 6760320), (14, 5794560), (15, 5408256), (16, 5070240), (18, 4506880), (20, 4056192), (21, 3863040), (24, 3380160), (28, 2897280), (30, 2704128), (32, 2535120), (35, 2317824), (36, 2253440), (40, 2028096), (42, 1931520), (45, 1802752), (48, 1690080), (56, 1448640), (60, 1352064), (63, 1287680), (64, 1267560), (70, 1158912), (72, 1126720), (80, 1014048), (84, 965760), (90, 901376), (96, 845040), (105, 772608), (112, 724320), (120, 676032), (126, 643840), (128, 633780), (140, 579456), (144, 563360), (160, 507024), (168, 482880), (180, 450688), (192, 422520), (210, 386304), (224, 362160), (240, 338016), (252, 321920), (256, 316890), (280, 289728), (288, 281680), (315, 257536), (320, 253512), (336, 241440), (360, 225344), (384, 211260), (420, 193152), (448, 181080), (480, 169008), (503, 161280), (504, 160960), (512, 158445), (560, 144864), (576, 140840), (630, 128768), (640, 126756), (672, 120720), (720, 112672), (768, 105630), (840, 96576), (896, 90540), (960, 84504), (1006, 80640), (1008, 80480), (1120, 72432), (1152, 70420), (1260, 64384), (1280, 63378), (1344, 60360), (1440, 56336), (1509, 53760), (1536, 52815), (1680, 48288), (1792, 45270), (1920, 42252), (2012, 40320), (2016, 40240), (2240, 36216), (2304, 35210), (2515, 32256), (2520, 32192), (2560, 31689), (2688, 30180), (2880, 28168), (3018, 26880), (3360, 24144), (3521, 23040), (3584, 22635), (3840, 21126), (4024, 20160), (4032, 20120), (4480, 18108), (4527, 17920), (4608, 17605), (5030, 16128), (5040, 16096), (5376, 15090), (5760, 14084), (6036, 13440), (6720, 12072), (7042, 11520), (7545, 10752), (7680, 10563), (8048, 10080), (8064, 10060), (8960, 9054)]