If p and q are prime numbers, how many divisors does the product p^4 * q^9 have?	Choose the correct choice from the following options.
A) 30 B) 35 C) 40 D) 50 E) 60
when a number N=a^x*b^y, where a and b are prime numbers, and x, y are positive integers, the number of divisors of N=(x+1)(y+1)   Therefore, the answer is D. 5*10=50
<result>D</result>
If p and q are prime numbers, how many divisors does the product p^4 * q^9 have?