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Two.

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Q: How many different prime numbers are in the prime factorization of 21?
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Related questions

How many prime numbers are in the prime factorization of 50?

Two.


How many prime numbers are in the prime factorization of 361?

Only one - which is repeated.


How many prime numbers are in the prime factorization of 60?

The prime factorization of 60 is: 2 x 2 x 3 x 5.


How many prime numbers does 63 have?

3 and 7 are the two different prime factors of 63. Prime factorization of 63 is 3 x 3 x 7.


How many prime numbers are in the prime factorization of 289?

Just one, used twice: 17 x 17 = 289


How many prime numbers are there IN 400?

2 and 5 are the two different prime factors of 400. The prime factorization of 400 is 2 x 2 x 2 x 2 x 5 x 5.


How many prime numbers are in the prime factorization of 50 include primes that repeat?

3. (2 x 5 x 5.)


Evenly how many prime numbers can go into 56?

The prime factorization of 56 is 2, 2, 2, and 7, so there there are two prime numbers, 2 and 7, that can evenly go into 56.


What are the products of three different prime numbers?

Since there are infinitely many prime numbers there are infinitely many sets of three prime numbers and so there are infinitely many products.


How many different prime numbers are in 21?

There are two different numbers. 3 and 7


How many prime numbers between 1 and 8888888888888888888888888888888888888888888888?

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How many times do prime numbers go into 297?

The prime factors of 297 are 3 and 11. The prime factorization of 297 is 3 x 3 x 3 x 11