It is just 11 because 11 is a Prime number
33 = 3 × 11
77 = 7 x 11
24 x 3 x 11
5 x 5 x 5 x 11
19 is already prime; no factorization.
No.
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