What is the Least Common Multiple of 28120 and 28139?

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 28120 and 28139 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 28120 and 28139, than apply into the LCM equation.

GCF(28120,28139) = 19
LCM(28120,28139) = ( 28120 × 28139) / 19
LCM(28120,28139) = 791268680 / 19
LCM(28120,28139) = 41645720

Least Common Multiple (LCM) of 28120 and 28139 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 28120 and 28139. First we will calculate the prime factors of 28120 and 28139.

Prime Factorization of 28120

Prime Factorization of 28139

Now multiplying the highest exponent prime factors to calculate the LCM of 28120 and 28139.

LCM(28120,28139) = 2³ × 5¹ × 19¹ × 37¹ × 1481¹
LCM(28120,28139) = 41645720