What is the Least Common Multiple of 78631 and 78638?

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 78631 and 78638 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 78631 and 78638, than apply into the LCM equation.

GCF(78631,78638) = 7
LCM(78631,78638) = ( 78631 × 78638) / 7
LCM(78631,78638) = 6183384578 / 7
LCM(78631,78638) = 883340654

Least Common Multiple (LCM) of 78631 and 78638 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 78631 and 78638. First we will calculate the prime factors of 78631 and 78638.

Prime Factorization of 78631

Prime Factorization of 78638

Now multiplying the highest exponent prime factors to calculate the LCM of 78631 and 78638.

LCM(78631,78638) = 7¹ × 47¹ × 239¹ × 2¹ × 41¹ × 137¹
LCM(78631,78638) = 883340654