Let n be a positive integer. If every prime number p that divides n also divides $p ^ { 2 }$ into n, then n is called a powerful number. Which of the following is NOT a powerful number? A) 27 B) 64 C) 72 D) 99 E) 108
Let n be a positive integer. If every prime number p that divides n also divides $p ^ { 2 }$ into n, then n is called a powerful number.
Which of the following is NOT a powerful number?\\
A) 27\\
B) 64\\
C) 72\\
D) 99\\
E) 108