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3 is a prime factor of 12 and of 21.

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Factoring and Multiples

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Q: What is a prime number for 12 and 21?
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Related questions

What prime number is a factor of 12 and 21?

3


What number is a prime factor of both 12 and 21?

3


Is number 21 prime or composite?

number 21 is prime


Is the prime number 21 is a prime number?

21 is a composite number, not a prime, having prime factors 3x7.


What numbers has the greatest number of prime factors 12 15 21 25?

12 (2x2x3)


Which pair of number is relatively prime 10 and 21 12 and 54 15 and 27 21 and 39?

10 and 21


What are prime number greater than 21?

There is an infinite number of prime numbers that are greater than 21. The next prime number after 21 is 23.


Are 11 and 21 prime numbers?

11 is a prime number but 21 is not a prime number as it is divisible by 3.


What prime number can be divided by 12?

There is no such prime number. If it can be divided by 12 then it is not prime.


What is the prime number after 12?

13 is the prime number after 12.


Is 21 seven a prime number?

21 is the product of two prime numbers, three and seven. A prime number is defined as a number divisible only by one or itself. So ... NO ... 21 is not a prime number.


Is 21 and 31 a prime number?

21 is composite number that is a multiple of 3. 31 is a prime number.


Is 21 a prime number?

A prime number is any integer evenly divisible by only itself, and the number 1. Since 21 is divisible by 3 and 7, it is a composite number, not a prime number.No, 21 is not a prime number.21 is divisible by 1, 3, 7, & 21No. 21=3*7


Why is 12 a prime number?

12 is a composite number that is a multiple of 2. 12 is not a prime number.


Is 21 a prime number or a composite number?

21 is a Composite Number. A prime number is a whole number that only has two factors which are itself and one. A composite number has factors in addition to one and itself. 21 is divisible by 3 and 7.


Is the number 21 prime composite or neither?

3 * 7 = 21 21 is not prime


Is the number 441 a prime number?

no, 21*21=441


Why is 21 a prime number?

Who says it is? 21 is a composite number!


Is 21 a prime number of composite?

21 is a composite number


Is 21 a factor of a prime number?

No. The only factors of a prime number are 1 and itself. The only way that 21 could be a factor of a prime number is if it were a prime number, but it is not because 21 is also divisible by 3 and 7.


Is the number 21 a prime?

No.


Is the number 21 prime?

No.


Is 21 x 2 a prime factorization of 42?

No, 21 is not a prime number.


What prime number have 21?

21 has two prime factors, 3 and 7.


Are 17 and 21 prime numbers?

17 is a prime number, but 21 is not (21 = 3 * 7).