What is the Least Common Multiple of 81791 and 81809?

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 81791 and 81809 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 81791 and 81809, than apply into the LCM equation.

GCF(81791,81809) = 1
LCM(81791,81809) = ( 81791 × 81809) / 1
LCM(81791,81809) = 6691239919 / 1
LCM(81791,81809) = 6691239919

Least Common Multiple (LCM) of 81791 and 81809 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 81791 and 81809. First we will calculate the prime factors of 81791 and 81809.

Prime Factorization of 81791

Prime Factorization of 81809

Now multiplying the highest exponent prime factors to calculate the LCM of 81791 and 81809.

LCM(81791,81809) = 89¹ × 919¹ × 7¹ × 13¹ × 29¹ × 31¹
LCM(81791,81809) = 6691239919