20657500

素因数分解:

$2^2\times 5^4\times {\mathrm{8263}}^1$

素因数の和:8287

約数の個数: 30

約数和(自身を含む): 45179288

約数和(自身を除く): 24521788

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 625, 1250, 2500, 8263, 16526, 33052, 41315, 82630, 165260, 206575, 413150, 826300, 1032875, 2065750, 4131500, 5164375, 10328750, 20657500]

約数ペア:

[(1, 20657500), (2, 10328750), (4, 5164375), (5, 4131500), (10, 2065750), (20, 1032875), (25, 826300), (50, 413150), (100, 206575), (125, 165260), (250, 82630), (500, 41315), (625, 33052), (1250, 16526), (2500, 8263)]