20986820

素因数分解:

$2^2\times 5^1\times {\mathrm{193}}^1\times {\mathrm{5437}}^1$

素因数の和:5639

約数の個数: 24

約数和(自身を含む): 44308824

約数和(自身を除く): 23322004

約数列:

[1, 2, 4, 5, 10, 20, 193, 386, 772, 965, 1930, 3860, 5437, 10874, 21748, 27185, 54370, 108740, 1049341, 2098682, 4197364, 5246705, 10493410, 20986820]

約数ペア:

[(1, 20986820), (2, 10493410), (4, 5246705), (5, 4197364), (10, 2098682), (20, 1049341), (193, 108740), (386, 54370), (772, 27185), (965, 21748), (1930, 10874), (3860, 5437)]