What is the Least Common Multiple of 20656 and 20665?

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 20656 and 20665 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20656 and 20665, than apply into the LCM equation.

GCF(20656,20665) = 1
LCM(20656,20665) = ( 20656 × 20665) / 1
LCM(20656,20665) = 426856240 / 1
LCM(20656,20665) = 426856240

Least Common Multiple (LCM) of 20656 and 20665 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20656 and 20665. First we will calculate the prime factors of 20656 and 20665.

Prime Factorization of 20656

Prime Factorization of 20665

Now multiplying the highest exponent prime factors to calculate the LCM of 20656 and 20665.

LCM(20656,20665) = 2⁴ × 1291¹ × 5¹ × 4133¹
LCM(20656,20665) = 426856240