Generally, in applied statistical contexts, you think in terms of independent and dependent variables and models that fit "coefficients" to thoses variables.

In contexts where the focus is on physical measurements, you may be more likely to think in terms of orders of magnitude and "factors" (multipliers) that relate quantities and effects.

Either way, you are describing a multiplicative constant -- and it's the same in French. Personally, when translating F>E, I follow the writer's choice and use the cognate term.