266440

素因数分解:

$2^3\times 5^1\times {\mathrm{6661}}^1$

素因数の和:6672

約数の個数: 16

約数和(自身を含む): 599580

約数和(自身を除く): 333140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 6661, 13322, 26644, 33305, 53288, 66610, 133220, 266440]

約数ペア:

[(1, 266440), (2, 133220), (4, 66610), (5, 53288), (8, 33305), (10, 26644), (20, 13322), (40, 6661)]