What is the Least Common Multiple of 81621 and 81628?

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 81621 and 81628 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 81621 and 81628, than apply into the LCM equation.

GCF(81621,81628) = 1
LCM(81621,81628) = ( 81621 × 81628) / 1
LCM(81621,81628) = 6662558988 / 1
LCM(81621,81628) = 6662558988

Least Common Multiple (LCM) of 81621 and 81628 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 81621 and 81628. First we will calculate the prime factors of 81621 and 81628.

Prime Factorization of 81621

Prime Factorization of 81628

Now multiplying the highest exponent prime factors to calculate the LCM of 81621 and 81628.

LCM(81621,81628) = 3³ × 3023¹ × 2² × 20407¹
LCM(81621,81628) = 6662558988