1536Y+8XY=200000
8XY=200000-1536Y
X = (200000-1536Y)/8Y
X = 200000/8Y - 1536Y/8Y
X = 25000/Y - 192
Y只要是25000的因數
X就會有整數解啦~~

Y可以用
1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 1000, 1250, 2500, 3125, 5000, 6250, 12500, 25000
-1, -2, -4, -5, -8, -10, -20, -25, -40, -50, -100, -125, -200, -250, -500, -625, -1000, -1250, -2500, -3125, -5000, -6250, -12500, -25000
X 就自己算啦~