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

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

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

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

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

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.

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

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

4 factors they are 1,3,7 and 21

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

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.

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.

The factors of 21: 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.

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 of the common factors of 21

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 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.

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

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.

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.

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