What is the Least Common Multiple of 17916 and 17920?

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 17916 and 17920 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 17916 and 17920, than apply into the LCM equation.

GCF(17916,17920) = 4
LCM(17916,17920) = ( 17916 × 17920) / 4
LCM(17916,17920) = 321054720 / 4
LCM(17916,17920) = 80263680

Least Common Multiple (LCM) of 17916 and 17920 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 17916 and 17920. First we will calculate the prime factors of 17916 and 17920.

Prime Factorization of 17916

Prime Factorization of 17920

Now multiplying the highest exponent prime factors to calculate the LCM of 17916 and 17920.

LCM(17916,17920) = 2⁹ × 3¹ × 1493¹ × 5¹ × 7¹
LCM(17916,17920) = 80263680