There are many possible answers. One such pair is 1 and -420.
420 = 2 x 2 x 3 x 5 x 7
vierhundertzwanzig
There's no answer to that question. In the entire kingdom of numbers of all shapes,sizes, and kinds, there's only one number equal to 420. The number is . . . . . 420.
How about: 5*84 = 420 as one example
2 and 210
2x210.
There are many possible answers. One such pair is 1 and -420.
-397
420 = 2 x 2 x 3 x 5 x 7
463
421
2 x 2 x 3 x 5 x 7
1680
-356
420
484