What are the least common multiples of 7, 14 and 21?
Matthew Perez
Updated on February 25, 2026
For the LCM of 7,14 and 21, we can ignore 7 completely because it is a factor of the other two numbers, so will automatically be factor of every one of those multiples. Write each number as the product of the prime factors: Multiples of 7: 7, 14, 21, 28, 35, 42, 49… Multiples of 14: 14, 28, 42, 56… Multiples of 21: 21, 42, 63… It is 42 !!
How to calculate the least common multiple of 8 and 14?
Least Common Multiple of 8 and 14 Least common multipleor lowest common denominator (lcd) can be calculated in two way; with the LCM formula calculation of greatest common factor (GCF), or multiplying the prime factors with the highest exponent factor. Least common multiple (LCM) of 8 and 14 is 56. LCM(8,14) = 56
What is the formula for LCM ( 7, 14 )?
LCM(7,14) = 14. Least common multiple or lowest common denominator (lcd) can be calculated in two way; with the LCM formula calculation of greatest common factor (GCF), or multiplying the prime factors with the highest exponent factor. LCM Calculator and. The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
Which is the formula for the least common multiple?
The formula of LCM is LCM (a,b) = ( a × b) / GCF (a,b). We need to calculate greatest common factor 7 and 14, than apply into the LCM equation. Least common multiple can be found by multiplying the highest exponent prime factors of 7 and 14. First we will calculate the prime factors of 7 and 14. Prime factors of 7 are 7.
Where can I find the least common multiple?
Least common multiple can be found by multiplying the highest exponent prime factors of 7 and 21. First we will calculate the prime factors of 7 and 21. Prime factors of 7 are 7. Prime factorization of 7 in exponential form is: Prime factors of 21 are 3, 7. Prime factorization of 21 in exponential form is:
How to calculate the LCM of 7, 21?
Prime factors of 7 are 7. Prime factorization of 7 in exponential form is: Prime factors of 21 are 3, 7. Prime factorization of 21 in exponential form is: Now multiplying the highest exponent prime factors to calculate the LCM of 7 and 21.
How to calculate the greatest common factor 7 and 21?
We need to calculate greatest common factor 7 and 21, than apply into the LCM equation. Least common multiple can be found by multiplying the highest exponent prime factors of 7 and 21. First we will calculate the prime factors of 7 and 21. Prime factors of 7 are 7. Prime factorization of 7 in exponential form is: Prime factors of 21 are 3, 7.
