What is the Least Common Multiple of 39200 and 39220?

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 39200 and 39220 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 39200 and 39220, than apply into the LCM equation.

GCF(39200,39220) = 20
LCM(39200,39220) = ( 39200 × 39220) / 20
LCM(39200,39220) = 1537424000 / 20
LCM(39200,39220) = 76871200

Least Common Multiple (LCM) of 39200 and 39220 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 39200 and 39220. First we will calculate the prime factors of 39200 and 39220.

Prime Factorization of 39200

Prime Factorization of 39220

Now multiplying the highest exponent prime factors to calculate the LCM of 39200 and 39220.

LCM(39200,39220) = 2⁵ × 5² × 7² × 37¹ × 53¹
LCM(39200,39220) = 76871200