What is the Least Common Multiple of 538 and 556?

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 538 and 556 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 538 and 556, than apply into the LCM equation.

GCF(538,556) = 2
LCM(538,556) = ( 538 × 556) / 2
LCM(538,556) = 299128 / 2
LCM(538,556) = 149564

Least Common Multiple (LCM) of 538 and 556 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 538 and 556. First we will calculate the prime factors of 538 and 556.

Prime Factorization of 538

Prime Factorization of 556

Now multiplying the highest exponent prime factors to calculate the LCM of 538 and 556.

LCM(538,556) = 2² × 269¹ × 139¹
LCM(538,556) = 149564