Study guides

Q: How many factors does the number 21 have?

Write your answer...

Submit

Related questions

The factors of 21 are :1,3,7,21

The number 21 has only four factors: 1, 3, 7, and 21. Many number have more than four factors. Among them are 1x2x3x4x5 = 120.

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

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.

The factors of 21 are: 1, 3, 7, 21.

The factors of 21 are: 1, 3, 7, 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.

21

There cannot be any. If the number has 21 and 351 as factors then it already has 16 factors.

The factors of 21 are 1, 3, 7 and 21. For them to be common, they need to be compared to another set of factors.

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

The factors of 21 are 1, 3, 7 and 21. To be common, they need to be compared to another set of factors.

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.

Six: 1 3 7 9 21 63.

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

The factors of 21 are 1, 3, 7, and 21 which means that 21 is composite.

Factors are numbers you can multiply together to get another number. Therefore, all the factors of 21 are as follows: 1,3,7,21.

19 is a prime number. Its only factors are 1 and 19. 21 is a composite number. Its factors are 1, 3, 7, and 21. 23 is a prime number. Its only factors are 1 and 23.

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.

four factors: 1, 3, 7, 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.

21

21

21

The factors for the number 63 are 1, 3, 7, 9, 21, and 63.