81091120

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{2143}}^1$

素因数の和:2210

約数の個数: 80

約数和(自身を含む): 210557952

約数和(自身を除く): 129466832

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 43, 44, 55, 80, 86, 88, 110, 172, 176, 215, 220, 344, 430, 440, 473, 688, 860, 880, 946, 1720, 1892, 2143, 2365, 3440, 3784, 4286, 4730, 7568, 8572, 9460, 10715, 17144, 18920, 21430, 23573, 34288, 37840, 42860, 47146, 85720, 92149, 94292, 117865, 171440, 184298, 188584, 235730, 368596, 377168, 460745, 471460, 737192, 921490, 942920, 1013639, 1474384, 1842980, 1885840, 2027278, 3685960, 4054556, 5068195, 7371920, 8109112, 10136390, 16218224, 20272780, 40545560, 81091120]

約数ペア:

[(1, 81091120), (2, 40545560), (4, 20272780), (5, 16218224), (8, 10136390), (10, 8109112), (11, 7371920), (16, 5068195), (20, 4054556), (22, 3685960), (40, 2027278), (43, 1885840), (44, 1842980), (55, 1474384), (80, 1013639), (86, 942920), (88, 921490), (110, 737192), (172, 471460), (176, 460745), (215, 377168), (220, 368596), (344, 235730), (430, 188584), (440, 184298), (473, 171440), (688, 117865), (860, 94292), (880, 92149), (946, 85720), (1720, 47146), (1892, 42860), (2143, 37840), (2365, 34288), (3440, 23573), (3784, 21430), (4286, 18920), (4730, 17144), (7568, 10715), (8572, 9460)]