20654800

素因数分解:

$2^4\times 5^2\times {\mathrm{51637}}^1$

素因数の和:51655

約数の個数: 30

約数和(自身を含む): 49624118

約数和(自身を除く): 28969318

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 51637, 103274, 206548, 258185, 413096, 516370, 826192, 1032740, 1290925, 2065480, 2581850, 4130960, 5163700, 10327400, 20654800]

約数ペア:

[(1, 20654800), (2, 10327400), (4, 5163700), (5, 4130960), (8, 2581850), (10, 2065480), (16, 1290925), (20, 1032740), (25, 826192), (40, 516370), (50, 413096), (80, 258185), (100, 206548), (200, 103274), (400, 51637)]