What is the Least Common Multiple of 21320 and 21331?

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 21320 and 21331 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21320 and 21331, than apply into the LCM equation.

GCF(21320,21331) = 1
LCM(21320,21331) = ( 21320 × 21331) / 1
LCM(21320,21331) = 454776920 / 1
LCM(21320,21331) = 454776920

Least Common Multiple (LCM) of 21320 and 21331 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21320 and 21331. First we will calculate the prime factors of 21320 and 21331.

Prime Factorization of 21320

Prime Factorization of 21331

Now multiplying the highest exponent prime factors to calculate the LCM of 21320 and 21331.

LCM(21320,21331) = 2³ × 5¹ × 13¹ × 41¹ × 83¹ × 257¹
LCM(21320,21331) = 454776920