20657240

素因数分解:

$2^3\times 5^1\times {\mathrm{516431}}^1$

素因数の和:516442

約数の個数: 16

約数和(自身を含む): 46478880

約数和(自身を除く): 25821640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 516431, 1032862, 2065724, 2582155, 4131448, 5164310, 10328620, 20657240]

約数ペア:

[(1, 20657240), (2, 10328620), (4, 5164310), (5, 4131448), (8, 2582155), (10, 2065724), (20, 1032862), (40, 516431)]