At school to calculate the intensity of the magnetic field generated by a solenoid we use the formula:

$$B=μ_0× \frac{N}{l}×i$$ 

(I tried to write the formula using preformatted text, but I didn't have success even though I followed the tutorial, so I wrote it like that)

Where ; 

$μ_0 =$  Vacuum permeability

$N=$ number of windings

$l=$  lenght of the solenoid 

$i=$ current flowing through it

(I know that I should use the magnetic permeability of the air, but it doesn't change a lot)

I would like to know if the type of wire we use to build the solenoid can influence the magnetic field. For example, let's assume we are using a multi-strand wire. Does a solenoid made of this kind of wire behave like many parallel solenoids or it acts like a single one? And if the formula changes in some way, please explain me how.
Thanks in advance.