What is the Least Common Multiple of 81781 and 81798?

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 81781 and 81798 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 81781 and 81798, than apply into the LCM equation.

GCF(81781,81798) = 1
LCM(81781,81798) = ( 81781 × 81798) / 1
LCM(81781,81798) = 6689522238 / 1
LCM(81781,81798) = 6689522238

Least Common Multiple (LCM) of 81781 and 81798 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 81781 and 81798. First we will calculate the prime factors of 81781 and 81798.

Prime Factorization of 81781

Prime Factorization of 81798

Now multiplying the highest exponent prime factors to calculate the LCM of 81781 and 81798.

LCM(81781,81798) = 7² × 1669¹ × 2¹ × 3¹ × 13633¹
LCM(81781,81798) = 6689522238