What is the Least Common Multiple of 7785 and 7790?

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 7785 and 7790 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7785 and 7790, than apply into the LCM equation.

GCF(7785,7790) = 5
LCM(7785,7790) = ( 7785 × 7790) / 5
LCM(7785,7790) = 60645150 / 5
LCM(7785,7790) = 12129030

Least Common Multiple (LCM) of 7785 and 7790 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 7785 and 7790. First we will calculate the prime factors of 7785 and 7790.

Prime Factorization of 7785

Prime Factorization of 7790

Now multiplying the highest exponent prime factors to calculate the LCM of 7785 and 7790.

LCM(7785,7790) = 3² × 5¹ × 173¹ × 2¹ × 19¹ × 41¹
LCM(7785,7790) = 12129030