# Least Common Multiple of 20 and 50

Least common multiple (LCM) of 20 and 50 is 100.

LCM(20,50) = 100

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

## Least Common Multiple of 20 and 50 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20 and 50, than apply into the LCM equation.

GCF(20,50) = 10
LCM(20,50) = ( 20 × 50) / 10
LCM(20,50) = 1000 / 10
LCM(20,50) = 100

## Least Common Multiple (LCM) of 20 and 50 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20 and 50. First we will calculate the prime factors of 20 and 50.

### Prime Factorization of 20

Prime factors of 20 are 2, 5. Prime factorization of 20 in exponential form is:

20 = 22 × 51

### Prime Factorization of 50

Prime factors of 50 are 2, 5. Prime factorization of 50 in exponential form is:

50 = 21 × 52

Now multiplying the highest exponent prime factors to calculate the LCM of 20 and 50.

LCM(20,50) = 22 × 52
LCM(20,50) = 100