What is the Least Common Multiple of 861 and 865?

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 861 and 865 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 861 and 865, than apply into the LCM equation.

GCF(861,865) = 1
LCM(861,865) = ( 861 × 865) / 1
LCM(861,865) = 744765 / 1
LCM(861,865) = 744765

Least Common Multiple (LCM) of 861 and 865 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 861 and 865. First we will calculate the prime factors of 861 and 865.

Prime Factorization of 861

Prime Factorization of 865

Now multiplying the highest exponent prime factors to calculate the LCM of 861 and 865.

LCM(861,865) = 3¹ × 7¹ × 41¹ × 5¹ × 173¹
LCM(861,865) = 744765