What is the Least Common Multiple of 756 and 765?

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 756 and 765 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 756 and 765, than apply into the LCM equation.

GCF(756,765) = 9
LCM(756,765) = ( 756 × 765) / 9
LCM(756,765) = 578340 / 9
LCM(756,765) = 64260

Least Common Multiple (LCM) of 756 and 765 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 756 and 765. First we will calculate the prime factors of 756 and 765.

Prime Factorization of 756

Prime Factorization of 765

Now multiplying the highest exponent prime factors to calculate the LCM of 756 and 765.

LCM(756,765) = 2² × 3³ × 7¹ × 5¹ × 17¹
LCM(756,765) = 64260