200有因数2,4,5,8,10,20,25,40,50,100,200
50有因数2,5,25,50
100有因数2,4,5,10,20,25,50,100
150有因数2,3,5,6,10,15,25,30,50,75,150
从中可得200独有因数8与40即为所求