199972880

素因数分解:

$2^4\times 5^1\times {\mathrm{2499661}}^1$

素因数の和:2499674

約数の個数: 20

約数和(自身を含む): 464937132

約数和(自身を除く): 264964252

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2499661, 4999322, 9998644, 12498305, 19997288, 24996610, 39994576, 49993220, 99986440, 199972880]

約数ペア:

[(1, 199972880), (2, 99986440), (4, 49993220), (5, 39994576), (8, 24996610), (10, 19997288), (16, 12498305), (20, 9998644), (40, 4999322), (80, 2499661)]