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

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Q: What are all of the factors for the number 21?
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Related questions

List all the factors of 21?

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


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.


List all the factors of 21 is the number 21 prime or composite?

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


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

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


How many factors has the number 21?

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


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 number is a common factor of 42 and 21?

Since 21 is a factor of 42, all of its factors are common.


What are the proper factors of the number 21?

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


How many factors does the number 21 have?

4 factors they are 1,3,7 and 21


Find all factors of number 63?

Factors of 63 are 1, 3, 7, 9, 21 and 63.


The factors of a number are 1 3 7 and 21 what is the number?

21


What is a number that has exactly eight factors including 21 351 and itself?

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


What are the common factors number 21?

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.


What factors of a number equal 21?

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


What are the common factors of 42 and 63?

A factor is a divisor - a number that will evenly divide into another number. One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them. The factors of 42 are 1, 2, 3, 6, 7, 14, 21, and 42. The factors of 63 are 1, 3, 7, 9, 21, and 63. The common factors are 1, 3, 7, and 21.


What are all the common factors of 21?

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


What number has more factors than 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.


What are common factors with a given number of 21?

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


What are all the factors of21?

what are all of the common factors of 21


What number do 12 21 and 63 have in common?

The only common factor of all three numbers is 3. (The numbers 21 and 63 share all of the factors of 21 : 1, 3, 7, and 21.)


If 21 divides into M what else must dive into M?

If 21 divides into M then all the factors of 21 must divide into M.The factors of 21 are 1, 3, 7, 21 (we usually avoid the factor 1 and the number)So, 3 and 7 must divide into M.


All factors of 147?

The prime factors of 147 are 3, 7 and 7. From those we can create all the other factors ... (3 x 7) and (7 x 7) which are 21 and 49. 1 is a factor of every number, and every number is a factor of itself. So all the factors of 147 are 1, 3, 7, 7, 21, 49 and 147


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 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.


Is the prime number 21 is a prime number?

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