# What is the Least Common Multiple of 139 and 156?

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 139 and 156 is 21684.

LCM(139,156) = 21684

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## Least Common Multiple of 139 and 156 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 139 and 156, than apply into the LCM equation.

GCF(139,156) = 1
LCM(139,156) = ( 139 × 156) / 1
LCM(139,156) = 21684 / 1
LCM(139,156) = 21684

## Least Common Multiple (LCM) of 139 and 156 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 139 and 156. First we will calculate the prime factors of 139 and 156.

### Prime Factorization of 139

Prime factors of 139 are 139. Prime factorization of 139 in exponential form is:

139 = 1391

### Prime Factorization of 156

Prime factors of 156 are 2, 3, 13. Prime factorization of 156 in exponential form is:

156 = 22 × 31 × 131

Now multiplying the highest exponent prime factors to calculate the LCM of 139 and 156.

LCM(139,156) = 1391 × 22 × 31 × 131
LCM(139,156) = 21684