19903840

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{263}}^1$

素因数の和:332

約数の個数: 96

約数和(自身を含む): 52690176

約数和(自身を除く): 32786336

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 43, 44, 55, 80, 86, 88, 110, 160, 172, 176, 215, 220, 263, 344, 352, 430, 440, 473, 526, 688, 860, 880, 946, 1052, 1315, 1376, 1720, 1760, 1892, 2104, 2365, 2630, 2893, 3440, 3784, 4208, 4730, 5260, 5786, 6880, 7568, 8416, 9460, 10520, 11309, 11572, 14465, 15136, 18920, 21040, 22618, 23144, 28930, 37840, 42080, 45236, 46288, 56545, 57860, 75680, 90472, 92576, 113090, 115720, 124399, 180944, 226180, 231440, 248798, 361888, 452360, 462880, 497596, 621995, 904720, 995192, 1243990, 1809440, 1990384, 2487980, 3980768, 4975960, 9951920, 19903840]

約数ペア:

[(1, 19903840), (2, 9951920), (4, 4975960), (5, 3980768), (8, 2487980), (10, 1990384), (11, 1809440), (16, 1243990), (20, 995192), (22, 904720), (32, 621995), (40, 497596), (43, 462880), (44, 452360), (55, 361888), (80, 248798), (86, 231440), (88, 226180), (110, 180944), (160, 124399), (172, 115720), (176, 113090), (215, 92576), (220, 90472), (263, 75680), (344, 57860), (352, 56545), (430, 46288), (440, 45236), (473, 42080), (526, 37840), (688, 28930), (860, 23144), (880, 22618), (946, 21040), (1052, 18920), (1315, 15136), (1376, 14465), (1720, 11572), (1760, 11309), (1892, 10520), (2104, 9460), (2365, 8416), (2630, 7568), (2893, 6880), (3440, 5786), (3784, 5260), (4208, 4730)]