What is the Least Common Multiple of 28705 and 28721?

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 28705 and 28721 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 28705 and 28721, than apply into the LCM equation.

GCF(28705,28721) = 1
LCM(28705,28721) = ( 28705 × 28721) / 1
LCM(28705,28721) = 824436305 / 1
LCM(28705,28721) = 824436305

Least Common Multiple (LCM) of 28705 and 28721 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 28705 and 28721. First we will calculate the prime factors of 28705 and 28721.

Prime Factorization of 28705

Prime Factorization of 28721

Now multiplying the highest exponent prime factors to calculate the LCM of 28705 and 28721.

LCM(28705,28721) = 5¹ × 5741¹ × 7¹ × 11¹ × 373¹
LCM(28705,28721) = 824436305