19625420

素因数分解:

$2^2\times 5^1\times {\mathrm{981271}}^1$

素因数の和:981280

約数の個数: 12

約数和(自身を含む): 41213424

約数和(自身を除く): 21588004

約数列:

[1, 2, 4, 5, 10, 20, 981271, 1962542, 3925084, 4906355, 9812710, 19625420]

約数ペア:

[(1, 19625420), (2, 9812710), (4, 4906355), (5, 3925084), (10, 1962542), (20, 981271)]