What is the Least Common Multiple of 81870 and 81878?

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 81870 and 81878 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 81870 and 81878, than apply into the LCM equation.

GCF(81870,81878) = 2
LCM(81870,81878) = ( 81870 × 81878) / 2
LCM(81870,81878) = 6703351860 / 2
LCM(81870,81878) = 3351675930

Least Common Multiple (LCM) of 81870 and 81878 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 81870 and 81878. First we will calculate the prime factors of 81870 and 81878.

Prime Factorization of 81870

Prime Factorization of 81878

Now multiplying the highest exponent prime factors to calculate the LCM of 81870 and 81878.

LCM(81870,81878) = 2¹ × 3¹ × 5¹ × 2729¹ × 40939¹
LCM(81870,81878) = 3351675930