What is the Least Common Multiple of 85640 and 85645?

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 85640 and 85645 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 85640 and 85645, than apply into the LCM equation.

GCF(85640,85645) = 5
LCM(85640,85645) = ( 85640 × 85645) / 5
LCM(85640,85645) = 7334637800 / 5
LCM(85640,85645) = 1466927560

Least Common Multiple (LCM) of 85640 and 85645 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 85640 and 85645. First we will calculate the prime factors of 85640 and 85645.

Prime Factorization of 85640

Prime Factorization of 85645

Now multiplying the highest exponent prime factors to calculate the LCM of 85640 and 85645.

LCM(85640,85645) = 2³ × 5¹ × 2141¹ × 7¹ × 2447¹
LCM(85640,85645) = 1466927560