No.
327 = 3 × 109
19 is already prime; no factorization.
2x2
Prime Factorization: 2*5*31
43 is already prime; no factorization required.
No it isn't. 235/5 = 47 and 47 is a prim number. 235 isn't a prime number so it isn't a prim factorization. The real factorization is 47 * 5.
115 = 5 × 23
12 = 22 × 3
144 = 24 × 32
It is: 2, 3 and 7
216 = 23 × 33
2 x 3