Which number is a factor of 20 but not a multiple

- Which number is a factor of 20 but not a multiple of 5
- Which number is a factor of 20 but not a multiple of 4
- Which number is a factor of 20 but not a multiple of 2
- Which number is a factor of 20 but not a multiple of 10
- Which number is a factor of 20 but not a multiple of five
- Which number is a factor of 20 but not a multiple of four
- Which number below is a factor of 20 but not a multiple of 5