What is the Least Common Multiple of 8115 and 8120?

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 8115 and 8120 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 8115 and 8120, than apply into the LCM equation.

GCF(8115,8120) = 5
LCM(8115,8120) = ( 8115 × 8120) / 5
LCM(8115,8120) = 65893800 / 5
LCM(8115,8120) = 13178760

Least Common Multiple (LCM) of 8115 and 8120 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 8115 and 8120. First we will calculate the prime factors of 8115 and 8120.

Prime Factorization of 8115

Prime Factorization of 8120

Now multiplying the highest exponent prime factors to calculate the LCM of 8115 and 8120.

LCM(8115,8120) = 3¹ × 5¹ × 541¹ × 2³ × 7¹ × 29¹
LCM(8115,8120) = 13178760