208040020

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{241907}}^1$

素因数の和:241959

約数の個数: 24

約数和(自身を含む): 447045984

約数和(自身を除く): 239005964

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 241907, 483814, 967628, 1209535, 2419070, 4838140, 10402001, 20804002, 41608004, 52010005, 104020010, 208040020]

約数ペア:

[(1, 208040020), (2, 104020010), (4, 52010005), (5, 41608004), (10, 20804002), (20, 10402001), (43, 4838140), (86, 2419070), (172, 1209535), (215, 967628), (430, 483814), (860, 241907)]