What is the Least Common Multiple of 6480 and 6500?

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 6480 and 6500 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 6480 and 6500, than apply into the LCM equation.

GCF(6480,6500) = 20
LCM(6480,6500) = ( 6480 × 6500) / 20
LCM(6480,6500) = 42120000 / 20
LCM(6480,6500) = 2106000

Least Common Multiple (LCM) of 6480 and 6500 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 6480 and 6500. First we will calculate the prime factors of 6480 and 6500.

Prime Factorization of 6480

Prime Factorization of 6500

Now multiplying the highest exponent prime factors to calculate the LCM of 6480 and 6500.

LCM(6480,6500) = 2⁴ × 3⁴ × 5³ × 13¹
LCM(6480,6500) = 2106000