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They are: 3 and 7

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Q: What prime numbers go into 21?
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Related questions

What is the prime numbers of 21?

Do you mean, "What is the prime factorization of 21?"


Are 17 and 21 prime numbers?

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


What prime numbers equal to 21?

if you mean their product is 21, then 7x3=21


What are the prime numbers in 11 21 52 57 94 107?

11 and 107 are the prime numbers.


Do prime numbers go up to 100 or 10000?

Prime numbers go on forever.


What is the range of the first 9 prime numbers?

21


Are 14 an 21 composite?

yes as they are not prime numbers


Is 10 19 21 62 composite numbers?

19 is prime number. 10, 21 and 62 are composite numbers.


Do Prime numbers only can go into itself?

Not exactly. Prime numbers can also go into their multiples. The thing about a prime number is only itself and one can go into it.


Prime numbers between 21 and 30?

21, 23, 27 and 29


What are the prime numbers in the following 11 21 52 57 94 107?

The even numbers 52 and 94 can be eliminated right away because the only even prime number is 2. That leaves 11, 21, 57, and 107. 3 x 7 = 21, so it is not prime. 3 x 19 = 57, so it is not prime. 11 and 107 are the prime numbers.


Which is a prime numbers 21 23 25 or 27?

It is 23