# Least Common Multiple of 56 and 64

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 56 and 64 is 448.

LCM(56,64) = 448

LCM Calculator and

## Least Common Multiple of 56 and 64 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 56 and 64, than apply into the LCM equation.

GCF(56,64) = 8
LCM(56,64) = ( 56 × 64) / 8
LCM(56,64) = 3584 / 8
LCM(56,64) = 448

## Least Common Multiple (LCM) of 56 and 64 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 56 and 64. First we will calculate the prime factors of 56 and 64.

### Prime Factorization of 56

Prime factors of 56 are 2, 7. Prime factorization of 56 in exponential form is:

56 = 23 × 71

### Prime Factorization of 64

Prime factors of 64 are 2. Prime factorization of 64 in exponential form is:

64 = 26

Now multiplying the highest exponent prime factors to calculate the LCM of 56 and 64.

LCM(56,64) = 26 × 71
LCM(56,64) = 448