3999400

素因数分解:

$2^3\times 5^2\times {\mathrm{19997}}^1$

素因数の和:20013

約数の個数: 24

約数和(自身を含む): 9299070

約数和(自身を除く): 5299670

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 19997, 39994, 79988, 99985, 159976, 199970, 399940, 499925, 799880, 999850, 1999700, 3999400]

約数ペア:

[(1, 3999400), (2, 1999700), (4, 999850), (5, 799880), (8, 499925), (10, 399940), (20, 199970), (25, 159976), (40, 99985), (50, 79988), (100, 39994), (200, 19997)]