21257900

素因数分解:

$2^2\times 5^2\times {\mathrm{212579}}^1$

素因数の和:212593

約数の個数: 18

約数和(自身を含む): 46129860

約数和(自身を除く): 24871960

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 212579, 425158, 850316, 1062895, 2125790, 4251580, 5314475, 10628950, 21257900]

約数ペア:

[(1, 21257900), (2, 10628950), (4, 5314475), (5, 4251580), (10, 2125790), (20, 1062895), (25, 850316), (50, 425158), (100, 212579)]