All numbers are factors (of their multiples).
No 9 is not prime. It's factors are 1,3,9. Proper factors: 1,3. Factors are numbers that are multiplied with other numbers to get a product. Proper factors are factors of a number except for itself. No 9 is not prime. It's factors are 1,3,9. Proper factors: 1,3. Factors are numbers that are multiplied with other numbers to get a product. Proper factors are factors of a number except for itself. Composite numbers are numbers with more than 2 factors and more than 1 proper factor. Prime is the opposite of composite.
Prime numbers don't have proper factors.
Prime numbers don't have proper factors.
Prime numbers don't have proper factors.
Prime numbers don't have proper factors.
Prime numbers don't have proper factors.
Prime numbers don't have proper factors.
37 is prime. Prime numbers don't have proper factors.
23 is prime. Prime numbers don't have proper factors.
23 is prime. Prime numbers don't have proper factors.
Prime numbers, like 5, have no proper factors.
Prime numbers, like 53, have no proper factors.