18905810

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{571}}^1$

素因数の和:639

約数の個数: 64

約数和(自身を含む): 43490304

約数和(自身を除く): 24584494

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 43, 55, 70, 77, 86, 110, 154, 215, 301, 385, 430, 473, 571, 602, 770, 946, 1142, 1505, 2365, 2855, 3010, 3311, 3997, 4730, 5710, 6281, 6622, 7994, 12562, 16555, 19985, 24553, 31405, 33110, 39970, 43967, 49106, 62810, 87934, 122765, 171871, 219835, 245530, 270083, 343742, 439670, 540166, 859355, 1350415, 1718710, 1890581, 2700830, 3781162, 9452905, 18905810]

約数ペア:

[(1, 18905810), (2, 9452905), (5, 3781162), (7, 2700830), (10, 1890581), (11, 1718710), (14, 1350415), (22, 859355), (35, 540166), (43, 439670), (55, 343742), (70, 270083), (77, 245530), (86, 219835), (110, 171871), (154, 122765), (215, 87934), (301, 62810), (385, 49106), (430, 43967), (473, 39970), (571, 33110), (602, 31405), (770, 24553), (946, 19985), (1142, 16555), (1505, 12562), (2365, 7994), (2855, 6622), (3010, 6281), (3311, 5710), (3997, 4730)]