81639400

素因数分解:

$2^3\times 5^2\times {\mathrm{408197}}^1$

素因数の和:408213

約数の個数: 24

約数和(自身を含む): 189812070

約数和(自身を除く): 108172670

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 408197, 816394, 1632788, 2040985, 3265576, 4081970, 8163940, 10204925, 16327880, 20409850, 40819700, 81639400]

約数ペア:

[(1, 81639400), (2, 40819700), (4, 20409850), (5, 16327880), (8, 10204925), (10, 8163940), (20, 4081970), (25, 3265576), (40, 2040985), (50, 1632788), (100, 816394), (200, 408197)]