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What is the least common factor for 18 and 21?

Updated: 8/21/2019
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The least common factor of any set of integers is 1.

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Q: What is the least common factor for 18 and 21?
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What is the least common factor of 18 and 21?

The factors of 18 are 1, 2, 3, 6, 9, and 18. The factors of 21 are 1, 3, 7, and 21. The common factors are 1 and 3. Therefore, the least common factor (the smallest common factor) is 1. Factorizations: 18-3x3x2 21-7x3


What is the lowest common factor of 12 18 and 21?

The least common factor of any set of integers is 1.


What is the common factor of 18 36?

You need at least two numbers to find a GCF.


The greater common factor of 18 21?

The greatest common factor of 18 and 21 is 3.


What is the least common factor of 18 21 and 36?

The factors of 18 are 1, 2, 3, 6, 9, and 18. The factors of 21 are 1, 3, 7, and 21. The factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, and 36. The factors they have in common are 1 and 3. So, the least (or lowest) common factor is 1. Note: The least common factor of two or more positive integers will always be 1.


What is the least common factor of 21 and 45?

The least common factor is: 1


What is the greatest common factor of 9 18 and 21?

The Greatest Common Factor of 9, 18, 21: 3


What is the least common factor of 21 and 6?

The least common factor is: 1


What is the least common multiple between 21 and 18?

The least common multiple of 21 , 18 = 126


What is the least common multiple for 18 and 21?

least common multiple for 18 and 21 is 126.


What is the least common factor for 21 and 35?

The least common factor of any set of integers is 1.


What is the least common factor of 10 and 21?

The least common factor of any set of integers is 1.