They are 2 and 3
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18 is not a prime number so no number can have 18 as a prime factor.
No, neither 12 nor 18 are prime numbers. A prime number is a number greater than 1 that can only be divided by 1 and itself. Both 12 and 18 can be divided by numbers other than 1 and themselves, so they are not prime.
no.
The prime factorization of 18 is 2 * 3^2
The only two prime factors of 18 are: 2, 3