If both 7^2 and 3^4 are factors of the number a*4^3*6^2*13^11, then what is the smallest possible value of a?
Choose the correct choice from the following answers:  A) 120  B) 256  C) 343  D) 441  E) 512
The number a must include at least 3^2*7^2 = 441   The answer is 441.
<result>D</result>
If both 7^2 and 3^4 are factors of the number a*4^3*6^2*13^11, then what is the smallest possible value of a?