What is the Least Common Multiple of 2138 and 2155?

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 of 2138 and 2155 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 2138 and 2155, than apply into the LCM equation.

GCF(2138,2155) = 1
LCM(2138,2155) = ( 2138 × 2155) / 1
LCM(2138,2155) = 4607390 / 1
LCM(2138,2155) = 4607390

Least Common Multiple (LCM) of 2138 and 2155 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 2138 and 2155. First we will calculate the prime factors of 2138 and 2155.

Prime Factorization of 2138

Prime Factorization of 2155

Now multiplying the highest exponent prime factors to calculate the LCM of 2138 and 2155.

LCM(2138,2155) = 2¹ × 1069¹ × 5¹ × 431¹
LCM(2138,2155) = 4607390