68121680

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{389}}^1$

素因数の和:612

約数の個数: 80

約数和(自身を含む): 174096000

約数和(自身を除く): 105974320

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 199, 220, 389, 398, 440, 778, 796, 880, 995, 1556, 1592, 1945, 1990, 2189, 3112, 3184, 3890, 3980, 4279, 4378, 6224, 7780, 7960, 8558, 8756, 10945, 15560, 15920, 17116, 17512, 21395, 21890, 31120, 34232, 35024, 42790, 43780, 68464, 77411, 85580, 87560, 154822, 171160, 175120, 309644, 342320, 387055, 619288, 774110, 851521, 1238576, 1548220, 1703042, 3096440, 3406084, 4257605, 6192880, 6812168, 8515210, 13624336, 17030420, 34060840, 68121680]

約数ペア:

[(1, 68121680), (2, 34060840), (4, 17030420), (5, 13624336), (8, 8515210), (10, 6812168), (11, 6192880), (16, 4257605), (20, 3406084), (22, 3096440), (40, 1703042), (44, 1548220), (55, 1238576), (80, 851521), (88, 774110), (110, 619288), (176, 387055), (199, 342320), (220, 309644), (389, 175120), (398, 171160), (440, 154822), (778, 87560), (796, 85580), (880, 77411), (995, 68464), (1556, 43780), (1592, 42790), (1945, 35024), (1990, 34232), (2189, 31120), (3112, 21890), (3184, 21395), (3890, 17512), (3980, 17116), (4279, 15920), (4378, 15560), (6224, 10945), (7780, 8756), (7960, 8558)]