How do I write one template class instead of several ones?

There are several template classes that work with function pointers taking one, two, etc. arguments.

template <typename A1, int(*func)(A1)>
class Something1
{
public:
    static void f()
    {
        A1 a1;
        // ...
        int r = func(a1);
        // ...
    }
};

template <typename A1, typename A2, int(*func)(A1, A2)>
class Something2
{
public:
    static void f()
    {
        A1 a1;
        A2 a2;
        // ...
        int r = func(a1, a2);
        // ...
    }
};

How do I write one template class that can work with pointers to functions that take any number of arguments? Is it possible?