What is the Least Common Multiple of 17620 and 17638?

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 17620 and 17638 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 17620 and 17638, than apply into the LCM equation.

GCF(17620,17638) = 2
LCM(17620,17638) = ( 17620 × 17638) / 2
LCM(17620,17638) = 310781560 / 2
LCM(17620,17638) = 155390780

Least Common Multiple (LCM) of 17620 and 17638 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 17620 and 17638. First we will calculate the prime factors of 17620 and 17638.

Prime Factorization of 17620

Prime Factorization of 17638

Now multiplying the highest exponent prime factors to calculate the LCM of 17620 and 17638.

LCM(17620,17638) = 2² × 5¹ × 881¹ × 8819¹
LCM(17620,17638) = 155390780