What is the Least Common Multiple of 81775 and 81781?

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 81775 and 81781 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 81775 and 81781, than apply into the LCM equation.

GCF(81775,81781) = 1
LCM(81775,81781) = ( 81775 × 81781) / 1
LCM(81775,81781) = 6687641275 / 1
LCM(81775,81781) = 6687641275

Least Common Multiple (LCM) of 81775 and 81781 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 81775 and 81781. First we will calculate the prime factors of 81775 and 81781.

Prime Factorization of 81775

Prime Factorization of 81781

Now multiplying the highest exponent prime factors to calculate the LCM of 81775 and 81781.

LCM(81775,81781) = 5² × 3271¹ × 7² × 1669¹
LCM(81775,81781) = 6687641275