81405520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{503}}^1$

素因数の和:557

約数の個数: 120

約数和(自身を含む): 230235264

約数和(自身を除く): 148829744

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 34, 35, 40, 56, 68, 70, 80, 85, 112, 119, 136, 140, 170, 238, 272, 280, 289, 340, 476, 503, 560, 578, 595, 680, 952, 1006, 1156, 1190, 1360, 1445, 1904, 2012, 2023, 2312, 2380, 2515, 2890, 3521, 4024, 4046, 4624, 4760, 5030, 5780, 7042, 8048, 8092, 8551, 9520, 10060, 10115, 11560, 14084, 16184, 17102, 17605, 20120, 20230, 23120, 28168, 32368, 34204, 35210, 40240, 40460, 42755, 56336, 59857, 68408, 70420, 80920, 85510, 119714, 136816, 140840, 145367, 161840, 171020, 239428, 281680, 290734, 299285, 342040, 478856, 581468, 598570, 684080, 726835, 957712, 1017569, 1162936, 1197140, 1453670, 2035138, 2325872, 2394280, 2907340, 4070276, 4788560, 5087845, 5814680, 8140552, 10175690, 11629360, 16281104, 20351380, 40702760, 81405520]

約数ペア:

[(1, 81405520), (2, 40702760), (4, 20351380), (5, 16281104), (7, 11629360), (8, 10175690), (10, 8140552), (14, 5814680), (16, 5087845), (17, 4788560), (20, 4070276), (28, 2907340), (34, 2394280), (35, 2325872), (40, 2035138), (56, 1453670), (68, 1197140), (70, 1162936), (80, 1017569), (85, 957712), (112, 726835), (119, 684080), (136, 598570), (140, 581468), (170, 478856), (238, 342040), (272, 299285), (280, 290734), (289, 281680), (340, 239428), (476, 171020), (503, 161840), (560, 145367), (578, 140840), (595, 136816), (680, 119714), (952, 85510), (1006, 80920), (1156, 70420), (1190, 68408), (1360, 59857), (1445, 56336), (1904, 42755), (2012, 40460), (2023, 40240), (2312, 35210), (2380, 34204), (2515, 32368), (2890, 28168), (3521, 23120), (4024, 20230), (4046, 20120), (4624, 17605), (4760, 17102), (5030, 16184), (5780, 14084), (7042, 11560), (8048, 10115), (8092, 10060), (8551, 9520)]