What is the Least Common Multiple of 20643 and 20661?

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 20643 and 20661 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20643 and 20661, than apply into the LCM equation.

GCF(20643,20661) = 3
LCM(20643,20661) = ( 20643 × 20661) / 3
LCM(20643,20661) = 426505023 / 3
LCM(20643,20661) = 142168341

Least Common Multiple (LCM) of 20643 and 20661 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20643 and 20661. First we will calculate the prime factors of 20643 and 20661.

Prime Factorization of 20643

Prime Factorization of 20661

Now multiplying the highest exponent prime factors to calculate the LCM of 20643 and 20661.

LCM(20643,20661) = 3¹ × 7¹ × 983¹ × 71¹ × 97¹
LCM(20643,20661) = 142168341