What is the Least Common Multiple of 78 and 93?

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 78 and 93 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 78 and 93, than apply into the LCM equation.

GCF(78,93) = 3
LCM(78,93) = ( 78 × 93) / 3
LCM(78,93) = 7254 / 3
LCM(78,93) = 2418

Least Common Multiple (LCM) of 78 and 93 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 78 and 93. First we will calculate the prime factors of 78 and 93.

Prime Factorization of 78

Prime Factorization of 93

Now multiplying the highest exponent prime factors to calculate the LCM of 78 and 93.

LCM(78,93) = 2¹ × 3¹ × 13¹ × 31¹
LCM(78,93) = 2418