20689508

素因数分解:

$2^2\times 7^1\times {\mathrm{109}}^1\times {\mathrm{6779}}^1$

素因数の和:6899

約数の個数: 24

約数和(自身を含む): 41764800

約数和(自身を除く): 21075292

約数列:

[1, 2, 4, 7, 14, 28, 109, 218, 436, 763, 1526, 3052, 6779, 13558, 27116, 47453, 94906, 189812, 738911, 1477822, 2955644, 5172377, 10344754, 20689508]

約数ペア:

[(1, 20689508), (2, 10344754), (4, 5172377), (7, 2955644), (14, 1477822), (28, 738911), (109, 189812), (218, 94906), (436, 47453), (763, 27116), (1526, 13558), (3052, 6779)]