What is the Least Common Multiple of 1668 and 1672?

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 1668 and 1672 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1668 and 1672, than apply into the LCM equation.

GCF(1668,1672) = 4
LCM(1668,1672) = ( 1668 × 1672) / 4
LCM(1668,1672) = 2788896 / 4
LCM(1668,1672) = 697224

Least Common Multiple (LCM) of 1668 and 1672 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1668 and 1672. First we will calculate the prime factors of 1668 and 1672.

Prime Factorization of 1668

Prime Factorization of 1672

Now multiplying the highest exponent prime factors to calculate the LCM of 1668 and 1672.

LCM(1668,1672) = 2³ × 3¹ × 139¹ × 11¹ × 19¹
LCM(1668,1672) = 697224