20605360

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{139}}^1$

素因数の和:278

約数の個数: 80

約数和(自身を含む): 51559200

約数和(自身を除く): 30953840

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 109, 136, 139, 170, 218, 272, 278, 340, 436, 545, 556, 680, 695, 872, 1090, 1112, 1360, 1390, 1744, 1853, 2180, 2224, 2363, 2780, 3706, 4360, 4726, 5560, 7412, 8720, 9265, 9452, 11120, 11815, 14824, 15151, 18530, 18904, 23630, 29648, 30302, 37060, 37808, 47260, 60604, 74120, 75755, 94520, 121208, 148240, 151510, 189040, 242416, 257567, 303020, 515134, 606040, 1030268, 1212080, 1287835, 2060536, 2575670, 4121072, 5151340, 10302680, 20605360]

約数ペア:

[(1, 20605360), (2, 10302680), (4, 5151340), (5, 4121072), (8, 2575670), (10, 2060536), (16, 1287835), (17, 1212080), (20, 1030268), (34, 606040), (40, 515134), (68, 303020), (80, 257567), (85, 242416), (109, 189040), (136, 151510), (139, 148240), (170, 121208), (218, 94520), (272, 75755), (278, 74120), (340, 60604), (436, 47260), (545, 37808), (556, 37060), (680, 30302), (695, 29648), (872, 23630), (1090, 18904), (1112, 18530), (1360, 15151), (1390, 14824), (1744, 11815), (1853, 11120), (2180, 9452), (2224, 9265), (2363, 8720), (2780, 7412), (3706, 5560), (4360, 4726)]