20905180

素因数分解:

$2^2\times 5^1\times {\mathrm{439}}^1\times {\mathrm{2381}}^1$

素因数の和:2829

約数の個数: 24

約数和(自身を含む): 44019360

約数和(自身を除く): 23114180

約数列:

[1, 2, 4, 5, 10, 20, 439, 878, 1756, 2195, 2381, 4390, 4762, 8780, 9524, 11905, 23810, 47620, 1045259, 2090518, 4181036, 5226295, 10452590, 20905180]

約数ペア:

[(1, 20905180), (2, 10452590), (4, 5226295), (5, 4181036), (10, 2090518), (20, 1045259), (439, 47620), (878, 23810), (1756, 11905), (2195, 9524), (2381, 8780), (4390, 4762)]