What is the Least Common Multiple of 791 and 809?

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 791 and 809 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 791 and 809, than apply into the LCM equation.

GCF(791,809) = 1
LCM(791,809) = ( 791 × 809) / 1
LCM(791,809) = 639919 / 1
LCM(791,809) = 639919

Least Common Multiple (LCM) of 791 and 809 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 791 and 809. First we will calculate the prime factors of 791 and 809.

Prime Factorization of 791

Prime Factorization of 809

Now multiplying the highest exponent prime factors to calculate the LCM of 791 and 809.

LCM(791,809) = 7¹ × 113¹ × 809¹
LCM(791,809) = 639919