What is the Least Common Multiple of 12120 and 12128?

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 12120 and 12128 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 12120 and 12128, than apply into the LCM equation.

GCF(12120,12128) = 8
LCM(12120,12128) = ( 12120 × 12128) / 8
LCM(12120,12128) = 146991360 / 8
LCM(12120,12128) = 18373920

Least Common Multiple (LCM) of 12120 and 12128 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 12120 and 12128. First we will calculate the prime factors of 12120 and 12128.

Prime Factorization of 12120

Prime Factorization of 12128

Now multiplying the highest exponent prime factors to calculate the LCM of 12120 and 12128.

LCM(12120,12128) = 2⁵ × 3¹ × 5¹ × 101¹ × 379¹
LCM(12120,12128) = 18373920