20178640

素因数分解:

$2^4\times 5^1\times {\mathrm{252233}}^1$

素因数の和:252246

約数の個数: 20

約数和(自身を含む): 46915524

約数和(自身を除く): 26736884

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 252233, 504466, 1008932, 1261165, 2017864, 2522330, 4035728, 5044660, 10089320, 20178640]

約数ペア:

[(1, 20178640), (2, 10089320), (4, 5044660), (5, 4035728), (8, 2522330), (10, 2017864), (16, 1261165), (20, 1008932), (40, 504466), (80, 252233)]