Question

What are the factors of 6tu

Answer 1

Depending on the value of 't' and 'u', the numerical value of that expression
could have almost anything for factors. 

For example, if  't' happens to be 3 and 'u' happens to be 10, then  6tu = 180,
and the factors of  6tu  are

   1,   2,   3,  4,  5,  6,  9,  10,  12,  15,  18,  20,  30,  36,  45,  60,  90, and  180.

But that would only be temporary ... only as long as  t=3  and  u=10. 

The only factors you can always count on, that don't depend on the values
of  't'  and  'u', are

           1,  6,  t,  u,  6t,  6u,  tu,  and  6tu .