What is the Least Common Multiple of 540 and 558?

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 540 and 558 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 540 and 558, than apply into the LCM equation.

GCF(540,558) = 18
LCM(540,558) = ( 540 × 558) / 18
LCM(540,558) = 301320 / 18
LCM(540,558) = 16740

Least Common Multiple (LCM) of 540 and 558 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 540 and 558. First we will calculate the prime factors of 540 and 558.

Prime Factorization of 540

Prime Factorization of 558

Now multiplying the highest exponent prime factors to calculate the LCM of 540 and 558.

LCM(540,558) = 2² × 3³ × 5¹ × 31¹
LCM(540,558) = 16740