9 isn't prime. The correct answer is 3 x 3 x 3
After making sure all the numbers are prime, multiply them together. If you get your original number, the prime factorization is correct.
The only number with that prime factorization has to be 48.
The prime number is the prime factorization. For example, the prime factorization of the prime number 3 is 3. Get it?
That's the prime factorization of 945.
23 is a prime number and does not require factorization.
9 is not a prime number. 3 x 3 x 3 = 27
The correct prime factorization of 117 is: 3 x 3 x 13
40 is simply a number. It does not and cannot explain prime factorisation!
After making sure all the numbers are prime, multiply them together. If you get your original number, the prime factorization is correct.
That is correct, the prime factorization of 240 is 24 x 3 x 5
In actual fact, the prime factorization of 42 is not 21 x 2, as 21 is not a prime number. The complete prime factorization of 42 is 2 x 3 x 7.
The answer was wrong. The fours should have been factored into 2 * 2. The composite number is 1200.
The factorization of a number is a series of numbers that make that number 
The given sentence isn't a prime factorization since 9 isn't prime. The correct prime factorization of 495 is 3 x 3 x 5 x 11
by using a prime factor tree
The only number with that prime factorization has to be 48.
2 x 2 x 2 x 2 x 5 = 80