20487905

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{139}}^1\times {\mathrm{719}}^1$

素因数の和:904

約数の個数: 16

約数和(自身を含む): 25401600

約数和(自身を除く): 4913695

約数列:

[1, 5, 41, 139, 205, 695, 719, 3595, 5699, 28495, 29479, 99941, 147395, 499705, 4097581, 20487905]

約数ペア:

[(1, 20487905), (5, 4097581), (41, 499705), (139, 147395), (205, 99941), (695, 29479), (719, 28495), (3595, 5699)]