What is the Least Common Multiple of 90640 and 90655?

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 90640 and 90655 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 90640 and 90655, than apply into the LCM equation.

GCF(90640,90655) = 5
LCM(90640,90655) = ( 90640 × 90655) / 5
LCM(90640,90655) = 8216969200 / 5
LCM(90640,90655) = 1643393840

Least Common Multiple (LCM) of 90640 and 90655 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 90640 and 90655. First we will calculate the prime factors of 90640 and 90655.

Prime Factorization of 90640

Prime Factorization of 90655

Now multiplying the highest exponent prime factors to calculate the LCM of 90640 and 90655.

LCM(90640,90655) = 2⁴ × 5¹ × 11¹ × 103¹ × 18131¹
LCM(90640,90655) = 1643393840