Add multiple columns to my dataframe (if statement)

I have the following Pandas DataFrame:

factor_A	factor_B	factor_C
0.0384	-0.0565	0.0964
-0.0598	0.0967	0.9156
0.8795	0.0254	-0.0853

I now want to create some new columns or a new df (factor_A_signal_A, factor_B_signal_B and so on) with the following if statement: If the factor_x is > 0, than 1, otherwise -1.

So far so good. But the problem is, that at the moment I don't know how many factors I will put into my dataframe and I can't do an if/else statement for example 100 columns.

Could you please help me? I need this step to multiply each factor with each signal.