Let \( P \) be a point on the parabola \( y^2=4ax \), where \( a>0 \). The normal to the parabola at \( P \) meets the \( x \)-axis at a point \( Q \). The area of the triangle \( PFQ \), where \( F \) is the focus of the parabola, is \( 120 \). If the slope \( m \) of the normal and \( a \) are both positive integers, then the pair \( (a,m) \) is:
