# What is the Least Common Multiple of 155 and 171?

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 155 and 171 is 26505.

LCM(155,171) = 26505

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## Least Common Multiple of 155 and 171 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 155 and 171, than apply into the LCM equation.

GCF(155,171) = 1
LCM(155,171) = ( 155 × 171) / 1
LCM(155,171) = 26505 / 1
LCM(155,171) = 26505

## Least Common Multiple (LCM) of 155 and 171 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 155 and 171. First we will calculate the prime factors of 155 and 171.

### Prime Factorization of 155

Prime factors of 155 are 5, 31. Prime factorization of 155 in exponential form is:

155 = 51 × 311

### Prime Factorization of 171

Prime factors of 171 are 3, 19. Prime factorization of 171 in exponential form is:

171 = 32 × 191

Now multiplying the highest exponent prime factors to calculate the LCM of 155 and 171.

LCM(155,171) = 51 × 311 × 32 × 191
LCM(155,171) = 26505