There are infinitely many possible answers:
1*70, 2*35, 3*(70/3), 4*17.5, 5*14, etc
You can also include irrationals: sqrt(2)*sqrt(2450), etc
And there is no reason to be restricted to two numbers: so 1*2*35, 1*2*3*(70/6) etc
As a product of its prime factors: 2*5*7 = 70
280
70 = 2 * 5 * 7.
70*2
210
140
The simplest answer is 1 and 70. There an infinte number of other pairs.
79
-356
87
107
53
87