Since 17 is a Prime number, the only two factors of 17 are 1 and 17.
1 and 17 or -1 and -17. If you're only talking about integers, those 2 are your only answers.
If your two numbers are not restricted to integers, well, then there's an infinite number of answers. Take any number, divided it into 17, and the resulting fraction (it won't divide evenly because 17's prime) will be your other number.
5 and 17 equal 85
x+17+6 equal to 23
-1
153 is equal to 9 x 17, or 32 x 17.
-241
1 x 34, 2 x 17.
Not sure about 720 but if the answer were to be 72 then the two numbers are 8 and 9 8 x 9 = 72 8 + 9 = 17
1 x 682 x 344 x 17
16 and 17
2 and 17
1 x 34, 2 x 17
11*17