Problem: how many distinct prime numbers are factors of 33150 ?
Rationale: start with the prime factorization : 33150 = 50 * 663 = ( 2 * 5 * 5 ) * 3 * 221 = ( 2 ) * ( 3 ) * ( 5 ^ 2 ) * ( 13 ) * ( 17 ) there are five distinct prime factors , { 2 , 3 , 5 , 13 , and 17 } answer : b .
annotated_formula: add(const_2, const_3)