Which is not a factor of 28

- Which number is not a factor of 28
- Which option is not a factor of 28
- Which answer is not a factor of 28
- Which choice is not a factor of 28
- Which of the following is not a factor of 28
- Which number is not a prime factor of 286
- Which of the following is a factor of
- Which number is a factor of 28
- Finding factors of a number