20887150

素因数分解:

$2^1\times 5^2\times {\mathrm{419}}^1\times {\mathrm{997}}^1$

素因数の和:1428

約数の個数: 24

約数和(自身を含む): 38981880

約数和(自身を除く): 18094730

約数列:

[1, 2, 5, 10, 25, 50, 419, 838, 997, 1994, 2095, 4190, 4985, 9970, 10475, 20950, 24925, 49850, 417743, 835486, 2088715, 4177430, 10443575, 20887150]

約数ペア:

[(1, 20887150), (2, 10443575), (5, 4177430), (10, 2088715), (25, 835486), (50, 417743), (419, 49850), (838, 24925), (997, 20950), (1994, 10475), (2095, 9970), (4190, 4985)]