What is the Least Common Multiple of 81643 and 81647?

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 81643 and 81647 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 81643 and 81647, than apply into the LCM equation.

GCF(81643,81647) = 1
LCM(81643,81647) = ( 81643 × 81647) / 1
LCM(81643,81647) = 6665906021 / 1
LCM(81643,81647) = 6665906021

Least Common Multiple (LCM) of 81643 and 81647 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 81643 and 81647. First we will calculate the prime factors of 81643 and 81647.

Prime Factorization of 81643

Prime Factorization of 81647

Now multiplying the highest exponent prime factors to calculate the LCM of 81643 and 81647.

LCM(81643,81647) = 19¹ × 4297¹ × 81647¹
LCM(81643,81647) = 6665906021