What is the Least Common Multiple of 12620 and 12638?

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 12620 and 12638 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 12620 and 12638, than apply into the LCM equation.

GCF(12620,12638) = 2
LCM(12620,12638) = ( 12620 × 12638) / 2
LCM(12620,12638) = 159491560 / 2
LCM(12620,12638) = 79745780

Least Common Multiple (LCM) of 12620 and 12638 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 12620 and 12638. First we will calculate the prime factors of 12620 and 12638.

Prime Factorization of 12620

Prime Factorization of 12638

Now multiplying the highest exponent prime factors to calculate the LCM of 12620 and 12638.

LCM(12620,12638) = 2² × 5¹ × 631¹ × 71¹ × 89¹
LCM(12620,12638) = 79745780