None of them. If you're adding, use 15 and 2
1 and 17.
How about: 2*2*17 = 68 as a product of its prime factors
1 x 51 = 51 3 x 17 = 51
17
94 multiplied by 17 is 1,598.
17 multiplied by 23 is 391.
5 and 17 equal 85
153 is equal to 9 x 17, or 32 x 17.
16 and 17
2 and 17
x+17+6 equal to 23
-1