0

# What are the common factors and greatest common factor of 21 and 42?

Updated: 4/28/2022

Wiki User

12y ago

The common factors of 21 and 42 are 3, 7 and 21. The greatest common factor (GCF) is 21.

Wiki User

12y ago
Study guides

20 cards

## A number a power of a variable or a product of the two is a monomial while a polynomial is the of monomials

➡️
See all cards
3.82
3068 Reviews

Earn +20 pts
Q: What are the common factors and greatest common factor of 21 and 42?
Submit
Still have questions?
Related questions

### What are the greatest common factors of 21 and 36?

The greatest common factor is 3

### What are the common factors and greatest common factor of 21?

There is neither a greatest common factor nor common factors of a single number, such as 21, because there cannot be any form of common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The greatest common factor is the largest factor that all the numbers being compared have in common. Thus, since there are not two or more numbers to compare, there are neither common factors nor a greatest common factor. The factors of 21 are 1, 3, 7, and 21.

### Why is 1 the greatest common factor of 21 and 40?

The greatest common factor of 21 and 40 is 1 because there are no larger common factors.

### What are the common factors and greatest common factor of 21 and 84?

Since 21 is a factor of 84, it is automatically the GCF and all of its factors are common.

### What are the factors of 14 and 21 and the greatest common factor?

The factors of 14 are: 1, 2, 7, 14.The factors of 21 are: 1, 3, 7, 21.The Greatest Common Factor (GCF) is: 7.

### What are the greatest common factors of 21 and 18?

The Greatest Common Factor (GCF) is: 3

### What are the greatest common factors of 10 and 21?

The Greatest Common Factor (GCF) is: 1

### What are greatest common factors of 14 and 21?

The Greatest Common Factor (GCF) is: 7

### Greatest common factors for 21 and 56?

The Greatest Common Factor (GCF) is: 7

### What is the greatest common factors of 63 and 147?

The greatest common factor of 63 and 147 is 21.

### What is the greatest common factors of 15 and 21?

The greatest common factor of 15 and 21 is 3The factors of 15 are: 1, 3, 5, 15The factors of 21 are: 1, 3, 7, 21The common factors are: 1, 3The Greatest Common Factor (GCF) is: 3

### Common factors of 14 and 21?

Common Factors: 2, 7 Greatest Common Factor: 7 * * * * * 2 is NOT a factor of 21 and so it cannot be a common factor.