256711680

素因数分解:

$2^{10}\times 3^4\times 5^1\times {\mathrm{619}}^1$

素因数の和:656

約数の個数: 220

約数和(自身を含む): 921395640

約数和(自身を除く): 664683960

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 32, 36, 40, 45, 48, 54, 60, 64, 72, 80, 81, 90, 96, 108, 120, 128, 135, 144, 160, 162, 180, 192, 216, 240, 256, 270, 288, 320, 324, 360, 384, 405, 432, 480, 512, 540, 576, 619, 640, 648, 720, 768, 810, 864, 960, 1024, 1080, 1152, 1238, 1280, 1296, 1440, 1536, 1620, 1728, 1857, 1920, 2160, 2304, 2476, 2560, 2592, 2880, 3072, 3095, 3240, 3456, 3714, 3840, 4320, 4608, 4952, 5120, 5184, 5571, 5760, 6190, 6480, 6912, 7428, 7680, 8640, 9216, 9285, 9904, 10368, 11142, 11520, 12380, 12960, 13824, 14856, 15360, 16713, 17280, 18570, 19808, 20736, 22284, 23040, 24760, 25920, 27648, 27855, 29712, 33426, 34560, 37140, 39616, 41472, 44568, 46080, 49520, 50139, 51840, 55710, 59424, 66852, 69120, 74280, 79232, 82944, 83565, 89136, 99040, 100278, 103680, 111420, 118848, 133704, 138240, 148560, 158464, 167130, 178272, 198080, 200556, 207360, 222840, 237696, 250695, 267408, 297120, 316928, 334260, 356544, 396160, 401112, 414720, 445680, 475392, 501390, 534816, 594240, 633856, 668520, 713088, 792320, 802224, 891360, 950784, 1002780, 1069632, 1188480, 1337040, 1426176, 1584640, 1604448, 1782720, 1901568, 2005560, 2139264, 2376960, 2674080, 2852352, 3169280, 3208896, 3565440, 4011120, 4278528, 4753920, 5348160, 5704704, 6417792, 7130880, 8022240, 8557056, 9507840, 10696320, 12835584, 14261760, 16044480, 17114112, 21392640, 25671168, 28523520, 32088960, 42785280, 51342336, 64177920, 85570560, 128355840, 256711680]

約数ペア:

[(1, 256711680), (2, 128355840), (3, 85570560), (4, 64177920), (5, 51342336), (6, 42785280), (8, 32088960), (9, 28523520), (10, 25671168), (12, 21392640), (15, 17114112), (16, 16044480), (18, 14261760), (20, 12835584), (24, 10696320), (27, 9507840), (30, 8557056), (32, 8022240), (36, 7130880), (40, 6417792), (45, 5704704), (48, 5348160), (54, 4753920), (60, 4278528), (64, 4011120), (72, 3565440), (80, 3208896), (81, 3169280), (90, 2852352), (96, 2674080), (108, 2376960), (120, 2139264), (128, 2005560), (135, 1901568), (144, 1782720), (160, 1604448), (162, 1584640), (180, 1426176), (192, 1337040), (216, 1188480), (240, 1069632), (256, 1002780), (270, 950784), (288, 891360), (320, 802224), (324, 792320), (360, 713088), (384, 668520), (405, 633856), (432, 594240), (480, 534816), (512, 501390), (540, 475392), (576, 445680), (619, 414720), (640, 401112), (648, 396160), (720, 356544), (768, 334260), (810, 316928), (864, 297120), (960, 267408), (1024, 250695), (1080, 237696), (1152, 222840), (1238, 207360), (1280, 200556), (1296, 198080), (1440, 178272), (1536, 167130), (1620, 158464), (1728, 148560), (1857, 138240), (1920, 133704), (2160, 118848), (2304, 111420), (2476, 103680), (2560, 100278), (2592, 99040), (2880, 89136), (3072, 83565), (3095, 82944), (3240, 79232), (3456, 74280), (3714, 69120), (3840, 66852), (4320, 59424), (4608, 55710), (4952, 51840), (5120, 50139), (5184, 49520), (5571, 46080), (5760, 44568), (6190, 41472), (6480, 39616), (6912, 37140), (7428, 34560), (7680, 33426), (8640, 29712), (9216, 27855), (9285, 27648), (9904, 25920), (10368, 24760), (11142, 23040), (11520, 22284), (12380, 20736), (12960, 19808), (13824, 18570), (14856, 17280), (15360, 16713)]