What is the Least Common Multiple of 67640 and 67645?

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 67640 and 67645 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 67640 and 67645, than apply into the LCM equation.

GCF(67640,67645) = 5
LCM(67640,67645) = ( 67640 × 67645) / 5
LCM(67640,67645) = 4575507800 / 5
LCM(67640,67645) = 915101560

Least Common Multiple (LCM) of 67640 and 67645 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 67640 and 67645. First we will calculate the prime factors of 67640 and 67645.

Prime Factorization of 67640

Prime Factorization of 67645

Now multiplying the highest exponent prime factors to calculate the LCM of 67640 and 67645.

LCM(67640,67645) = 2³ × 5¹ × 19¹ × 89¹ × 83¹ × 163¹
LCM(67640,67645) = 915101560