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Q: What are two factors of a number if 21 is one of the factors?

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

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.

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

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

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.

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.

21 has two prime factors, 3 and 7.

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.

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

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

576, for one.

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.

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

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.

3 and 7

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.

It is composite because it has more than two factors

It has more than two factors.

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

It is: 21 because it has more than two factors

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

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.

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.

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

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