What is the Least Common Multiple of 6540 and 6560?

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 6540 and 6560 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 6540 and 6560, than apply into the LCM equation.

GCF(6540,6560) = 20
LCM(6540,6560) = ( 6540 × 6560) / 20
LCM(6540,6560) = 42902400 / 20
LCM(6540,6560) = 2145120

Least Common Multiple (LCM) of 6540 and 6560 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 6540 and 6560. First we will calculate the prime factors of 6540 and 6560.

Prime Factorization of 6540

Prime Factorization of 6560

Now multiplying the highest exponent prime factors to calculate the LCM of 6540 and 6560.

LCM(6540,6560) = 2⁵ × 3¹ × 5¹ × 109¹ × 41¹
LCM(6540,6560) = 2145120