81431680

素因数分解:

$2^7\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{269}}^1$

素因数の和:342

約数の個数: 128

約数和(自身を含む): 218116800

約数和(自身を除く): 136685120

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 43, 44, 55, 64, 80, 86, 88, 110, 128, 160, 172, 176, 215, 220, 269, 320, 344, 352, 430, 440, 473, 538, 640, 688, 704, 860, 880, 946, 1076, 1345, 1376, 1408, 1720, 1760, 1892, 2152, 2365, 2690, 2752, 2959, 3440, 3520, 3784, 4304, 4730, 5380, 5504, 5918, 6880, 7040, 7568, 8608, 9460, 10760, 11567, 11836, 13760, 14795, 15136, 17216, 18920, 21520, 23134, 23672, 27520, 29590, 30272, 34432, 37840, 43040, 46268, 47344, 57835, 59180, 60544, 75680, 86080, 92536, 94688, 115670, 118360, 127237, 151360, 172160, 185072, 189376, 231340, 236720, 254474, 302720, 370144, 378752, 462680, 473440, 508948, 636185, 740288, 925360, 946880, 1017896, 1272370, 1480576, 1850720, 1893760, 2035792, 2544740, 3701440, 4071584, 5089480, 7402880, 8143168, 10178960, 16286336, 20357920, 40715840, 81431680]

約数ペア:

[(1, 81431680), (2, 40715840), (4, 20357920), (5, 16286336), (8, 10178960), (10, 8143168), (11, 7402880), (16, 5089480), (20, 4071584), (22, 3701440), (32, 2544740), (40, 2035792), (43, 1893760), (44, 1850720), (55, 1480576), (64, 1272370), (80, 1017896), (86, 946880), (88, 925360), (110, 740288), (128, 636185), (160, 508948), (172, 473440), (176, 462680), (215, 378752), (220, 370144), (269, 302720), (320, 254474), (344, 236720), (352, 231340), (430, 189376), (440, 185072), (473, 172160), (538, 151360), (640, 127237), (688, 118360), (704, 115670), (860, 94688), (880, 92536), (946, 86080), (1076, 75680), (1345, 60544), (1376, 59180), (1408, 57835), (1720, 47344), (1760, 46268), (1892, 43040), (2152, 37840), (2365, 34432), (2690, 30272), (2752, 29590), (2959, 27520), (3440, 23672), (3520, 23134), (3784, 21520), (4304, 18920), (4730, 17216), (5380, 15136), (5504, 14795), (5918, 13760), (6880, 11836), (7040, 11567), (7568, 10760), (8608, 9460)]