What is the Least Common Multiple of 81640 and 81655?

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 81640 and 81655 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 81640 and 81655, than apply into the LCM equation.

GCF(81640,81655) = 5
LCM(81640,81655) = ( 81640 × 81655) / 5
LCM(81640,81655) = 6666314200 / 5
LCM(81640,81655) = 1333262840

Least Common Multiple (LCM) of 81640 and 81655 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 81640 and 81655. First we will calculate the prime factors of 81640 and 81655.

Prime Factorization of 81640

Prime Factorization of 81655

Now multiplying the highest exponent prime factors to calculate the LCM of 81640 and 81655.

LCM(81640,81655) = 2³ × 5¹ × 13¹ × 157¹ × 7¹ × 2333¹
LCM(81640,81655) = 1333262840