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If 21 is a factor of a number, then the factors of 21 must also be factors. So 3 and 7

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โˆ™ 2011-10-18 21:33:55
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Q: What are two factors of a number if 21 is one of the factors?
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Related questions

Is 21 one a prime?

No 21 is not a prime number because it has more than two factors therefore it is a composite number


What is the composite of 21?

A composite number is a number that has more than two factors. The factors of 21 are 1, 3, 7, and 21. Therefore, 21 is a composite number.


What factors of a number equal 21?

Two factors of 110, 11 and 10, equal 21 if you add them.


What number is a prime is it 48 32 21 or 11?

It is 11 because it only has two factors which are itself and one


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 there a prime number that is a multiple of 21?

No, it is not possible. Every multiple of 21 is a composite number. 21 is a composite number and its factors are 1, 3, 7 and 21(4 factors). Any multiple of 21 must have all the factors of 21. So, every multiple of 21 has at least 4 factors. And a prime number has only two factors so, any multiple of 21 can't be prime.


What prime number have 21?

21 has two prime factors, 3 and 7.


Which one is a composite number 3 7 19 21?

3, 7, and 19 have only two factors, 1 and itself. They are prime numbers. 21 has more than 2 factors: 1, 3, 7, and 21. It is a composite number.


What is a prime number 91 51 31 21?

31 is the only one that has only two factors: 1 and itself. It is the prime number.


Is 21 a prime composite or neither number?

21 is a composite number because it has more than two factors


What number has 21 factors?

576, for one.


The number 21 has more tha two factors this maens it is a?

Composite is the opposite of prime which is a number with only two factors. 1 and itself.Composite has more than two factors so I guess a composite number is your answer.


Which one of these numbers is a prime number 15 21 27 31 33?

It is 31 because it has only two factors which are itself and one


Is 21 and 27 prime and composite numbers?

A prime number has exactly two factors, 1 and the number itself. The factors of 21 are 1, 3, 7, and 21, and the factors of 27 are 1, 3, 9, and 27. Since 21 and 27 have more than 2 factors, they are composite numbers.


What are two factors of the composite number 21 other than 1 and 21?

3 and 7


Can odd numbers be composite?

If an odd number has more than two factors then it is a composite number but if it has only two factors then it is a prime number. Although all prime numbers are odd except for 2 many more odd numbers are composite numbers having more than two factors as for example 21 is an odd number whose factors are 1, 3, 7 and 21.


Is number 21 a prime number or a composite number?

It is composite because it has more than two factors


Why isn't 21 a prime number?

It has more than two factors.


What is the prime number for 4 6 7 8 15 21?

It is 7 because it has only two factors which are itself and one


Which is NOT a prime number 2 13 29 21?

It is: 21 because it has more than two factors


Is 21 an prime or composite number?

It is a composite number because it has more than two factors


What are the factors and prime factors of 17 and 21?

17 is a prime number. It is only evenly divisible by itself and one.The factors of 21 are: 1, 3, 7, and 21.The prime factors of 21 are: 3 and 7.


What is a number with only four factors?

Any number that is the product of two primes (excluding itself and 1) has 4 factors. For example 21 has 4 factors: 1, 3, 7, 21; of which 3 and 7 are both prime.


If the product of two numbers is 21?

Aside from itself and 1, the only two factors of the number 21 are 7 and 3. Therefore, 7 x 3 = 21.


What is one number that is a factor of 12 and 21?

The common factors of 12 and 21 are 1 and 3.