20990300

素因数分解:

$2^2\times 5^2\times {\mathrm{79}}^1\times {\mathrm{2657}}^1$

素因数の和:2750

約数の個数: 36

約数和(自身を含む): 46142880

約数和(自身を除く): 25152580

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 79, 100, 158, 316, 395, 790, 1580, 1975, 2657, 3950, 5314, 7900, 10628, 13285, 26570, 53140, 66425, 132850, 209903, 265700, 419806, 839612, 1049515, 2099030, 4198060, 5247575, 10495150, 20990300]

約数ペア:

[(1, 20990300), (2, 10495150), (4, 5247575), (5, 4198060), (10, 2099030), (20, 1049515), (25, 839612), (50, 419806), (79, 265700), (100, 209903), (158, 132850), (316, 66425), (395, 53140), (790, 26570), (1580, 13285), (1975, 10628), (2657, 7900), (3950, 5314)]