What is the Least Common Multiple of 2815 and 2821?

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 2815 and 2821 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 2815 and 2821, than apply into the LCM equation.

GCF(2815,2821) = 1
LCM(2815,2821) = ( 2815 × 2821) / 1
LCM(2815,2821) = 7941115 / 1
LCM(2815,2821) = 7941115

Least Common Multiple (LCM) of 2815 and 2821 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 2815 and 2821. First we will calculate the prime factors of 2815 and 2821.

Prime Factorization of 2815

Prime Factorization of 2821

Now multiplying the highest exponent prime factors to calculate the LCM of 2815 and 2821.

LCM(2815,2821) = 5¹ × 563¹ × 7¹ × 13¹ × 31¹
LCM(2815,2821) = 7941115