For how many integers pair (x,y) satisfies the result
(1/x)+((1/y)=1/16	Choose the correct answer
A) a) 12	B) b) 6	C) c) 10	D) d) 16	E) e) 19
It seems that the accepted answer is wrong, according to WolframAlpha. The answer should be 31, which isn't even listed as a selectable answer.   e) 19
<result>E</result>
For how many integers pair (x,y) satisfies the result
(1/x)+((1/y)=1/16