What multiplication fact adds up to 86?

Answer 1

The multiplication fact 1 x 85 = 85 with 1 and 85 adds to 86;

The multiplication fact 2 x 84 = 168 with 2 and 84 adds to- 86;

etc.

But I don't quite think that is what you mean; I think you mean what are the factor pairs of 86:

1 x 86 & 2 x 43.