What is the Least Common Multiple of 51 and 56?
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.
Least common multiple (LCM) of 51 and 56 is 2856.
LCM(51,56) = 2856
Least Common Multiple of 51 and 56 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 51 and 56, than apply into the LCM equation.
GCF(51,56) = 1
LCM(51,56) = ( 51 × 56) / 1
LCM(51,56) = 2856 / 1
LCM(51,56) = 2856
Least Common Multiple (LCM) of 51 and 56 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 51 and 56. First we will calculate the prime factors of 51 and 56.
Prime Factorization of 51
Prime factors of 51 are 3, 17. Prime factorization of 51 in exponential form is:
51 = 31 × 171
Prime Factorization of 56
Prime factors of 56 are 2, 7. Prime factorization of 56 in exponential form is:
56 = 23 × 71
Now multiplying the highest exponent prime factors to calculate the LCM of 51 and 56.
LCM(51,56) = 31 × 171 × 23 × 71
LCM(51,56) = 2856