What is the Least Common Multiple of 20857 and 20865?

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 20857 and 20865 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20857 and 20865, than apply into the LCM equation.

GCF(20857,20865) = 1
LCM(20857,20865) = ( 20857 × 20865) / 1
LCM(20857,20865) = 435181305 / 1
LCM(20857,20865) = 435181305

Least Common Multiple (LCM) of 20857 and 20865 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20857 and 20865. First we will calculate the prime factors of 20857 and 20865.

Prime Factorization of 20857

Prime Factorization of 20865

Now multiplying the highest exponent prime factors to calculate the LCM of 20857 and 20865.

LCM(20857,20865) = 20857¹ × 3¹ × 5¹ × 13¹ × 107¹
LCM(20857,20865) = 435181305