What is the Least Common Multiple of 2109 and 2120?

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 2109 and 2120 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 2109 and 2120, than apply into the LCM equation.

GCF(2109,2120) = 1
LCM(2109,2120) = ( 2109 × 2120) / 1
LCM(2109,2120) = 4471080 / 1
LCM(2109,2120) = 4471080

Least Common Multiple (LCM) of 2109 and 2120 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 2109 and 2120. First we will calculate the prime factors of 2109 and 2120.

Prime Factorization of 2109

Prime Factorization of 2120

Now multiplying the highest exponent prime factors to calculate the LCM of 2109 and 2120.

LCM(2109,2120) = 3¹ × 19¹ × 37¹ × 2³ × 5¹ × 53¹
LCM(2109,2120) = 4471080