What is the Least Common Multiple of 12640 and 12647?

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 12640 and 12647 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 12640 and 12647, than apply into the LCM equation.

GCF(12640,12647) = 1
LCM(12640,12647) = ( 12640 × 12647) / 1
LCM(12640,12647) = 159858080 / 1
LCM(12640,12647) = 159858080

Least Common Multiple (LCM) of 12640 and 12647 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 12640 and 12647. First we will calculate the prime factors of 12640 and 12647.

Prime Factorization of 12640

Prime Factorization of 12647

Now multiplying the highest exponent prime factors to calculate the LCM of 12640 and 12647.

LCM(12640,12647) = 2⁵ × 5¹ × 79¹ × 12647¹
LCM(12640,12647) = 159858080