What is the Least Common Multiple of 28140 and 28148?

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 28140 and 28148 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 28140 and 28148, than apply into the LCM equation.

GCF(28140,28148) = 4
LCM(28140,28148) = ( 28140 × 28148) / 4
LCM(28140,28148) = 792084720 / 4
LCM(28140,28148) = 198021180

Least Common Multiple (LCM) of 28140 and 28148 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 28140 and 28148. First we will calculate the prime factors of 28140 and 28148.

Prime Factorization of 28140

Prime Factorization of 28148

Now multiplying the highest exponent prime factors to calculate the LCM of 28140 and 28148.

LCM(28140,28148) = 2² × 3¹ × 5¹ × 7¹ × 67¹ × 31¹ × 227¹
LCM(28140,28148) = 198021180