What is the Least Common Multiple of 12960 and 12980?

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 12960 and 12980 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 12960 and 12980, than apply into the LCM equation.

GCF(12960,12980) = 20
LCM(12960,12980) = ( 12960 × 12980) / 20
LCM(12960,12980) = 168220800 / 20
LCM(12960,12980) = 8411040

Least Common Multiple (LCM) of 12960 and 12980 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 12960 and 12980. First we will calculate the prime factors of 12960 and 12980.

Prime Factorization of 12960

Prime Factorization of 12980

Now multiplying the highest exponent prime factors to calculate the LCM of 12960 and 12980.

LCM(12960,12980) = 2⁵ × 3⁴ × 5¹ × 11¹ × 59¹
LCM(12960,12980) = 8411040