What is the Least Common Multiple of 6620 and 6638?

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 6620 and 6638 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 6620 and 6638, than apply into the LCM equation.

GCF(6620,6638) = 2
LCM(6620,6638) = ( 6620 × 6638) / 2
LCM(6620,6638) = 43943560 / 2
LCM(6620,6638) = 21971780

Least Common Multiple (LCM) of 6620 and 6638 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 6620 and 6638. First we will calculate the prime factors of 6620 and 6638.

Prime Factorization of 6620

Prime Factorization of 6638

Now multiplying the highest exponent prime factors to calculate the LCM of 6620 and 6638.

LCM(6620,6638) = 2² × 5¹ × 331¹ × 3319¹
LCM(6620,6638) = 21971780