What is the Least Common Multiple of 857 and 868?

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 857 and 868 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 857 and 868, than apply into the LCM equation.

GCF(857,868) = 1
LCM(857,868) = ( 857 × 868) / 1
LCM(857,868) = 743876 / 1
LCM(857,868) = 743876

Least Common Multiple (LCM) of 857 and 868 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 857 and 868. First we will calculate the prime factors of 857 and 868.

Prime Factorization of 857

Prime Factorization of 868

Now multiplying the highest exponent prime factors to calculate the LCM of 857 and 868.

LCM(857,868) = 857¹ × 2² × 7¹ × 31¹
LCM(857,868) = 743876