What is the Least Common Multiple of 7115 and 7120?

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 7115 and 7120 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7115 and 7120, than apply into the LCM equation.

GCF(7115,7120) = 5
LCM(7115,7120) = ( 7115 × 7120) / 5
LCM(7115,7120) = 50658800 / 5
LCM(7115,7120) = 10131760

Least Common Multiple (LCM) of 7115 and 7120 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 7115 and 7120. First we will calculate the prime factors of 7115 and 7120.

Prime Factorization of 7115

Prime Factorization of 7120

Now multiplying the highest exponent prime factors to calculate the LCM of 7115 and 7120.

LCM(7115,7120) = 5¹ × 1423¹ × 2⁴ × 89¹
LCM(7115,7120) = 10131760