What is the Least Common Multiple of 81820 and 81828?

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 81820 and 81828 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 81820 and 81828, than apply into the LCM equation.

GCF(81820,81828) = 4
LCM(81820,81828) = ( 81820 × 81828) / 4
LCM(81820,81828) = 6695166960 / 4
LCM(81820,81828) = 1673791740

Least Common Multiple (LCM) of 81820 and 81828 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 81820 and 81828. First we will calculate the prime factors of 81820 and 81828.

Prime Factorization of 81820

Prime Factorization of 81828

Now multiplying the highest exponent prime factors to calculate the LCM of 81820 and 81828.

LCM(81820,81828) = 2² × 5¹ × 4091¹ × 3² × 2273¹
LCM(81820,81828) = 1673791740