What is the Least Common Multiple of 8640 and 8656?

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 8640 and 8656 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 8640 and 8656, than apply into the LCM equation.

GCF(8640,8656) = 16
LCM(8640,8656) = ( 8640 × 8656) / 16
LCM(8640,8656) = 74787840 / 16
LCM(8640,8656) = 4674240

Least Common Multiple (LCM) of 8640 and 8656 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 8640 and 8656. First we will calculate the prime factors of 8640 and 8656.

Prime Factorization of 8640

Prime Factorization of 8656

Now multiplying the highest exponent prime factors to calculate the LCM of 8640 and 8656.

LCM(8640,8656) = 2⁶ × 3³ × 5¹ × 541¹
LCM(8640,8656) = 4674240