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The factors of 72 that are prime numbers are 2, 3, and 5. Prime numbers are numbers greater than 1 that can only be divided by 1 and themselves without leaving a remainder. In the case of 72, it can be broken down into the prime factors 2^3 * 3^2, where 2 and 3 are the prime factors.
To find five numbers that multiply to 630, we can start by breaking down 630 into its prime factors: 2 x 3 x 3 x 5 x 7. From this prime factorization, we can see that the five numbers are 2, 3, 3, 5, and 7. So, the five numbers that multiply to 630 are 2, 3, 3, 5, and 7.
The prime numbers (factors) of 39 are: 3 and 13
The prime numbers (factors) of 36 are: 2 and 3
All numbers have factors. Some numbers have some of the same factors as other numbers. These are common factors. If the factor is a prime number, it is a common prime factor. 3 is a prime number. 3 is a factor of 9. 3 is a factor of 12. 3 is a common prime factor of 9 and 12.