20805770840

素因数分解:

$2^3\times 5^1\times {\mathrm{520144271}}^1$

素因数の和:520144282

約数の個数: 16

約数和(自身を含む): 46812984480

約数和(自身を除く): 26007213640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 520144271, 1040288542, 2080577084, 2600721355, 4161154168, 5201442710, 10402885420, 20805770840]

約数ペア:

[(1, 20805770840), (2, 10402885420), (4, 5201442710), (5, 4161154168), (8, 2600721355), (10, 2080577084), (20, 1040288542), (40, 520144271)]