Question

on which 2 factor friction depends

Answer 1

1.  Force that acts normal to the surfaces in contact.  Normal force, weight or push-pull force that rubs the surfaces together or keeps the surfaces together.
               More the force, more the friction force.

2.  The nature of the two surfaces - roughness or smoothness and toughness or softness etc. This affects the coefficient of friction between a pair of surfaces.  smoothness reduces friction.

3.  Heat, temperature - affects the coefficient of friction a little. But not too much.  Higher temperature, less the friction.
 
    Friction force = μ * N    : two factors are  μ & N.