What is the Least Common Multiple of 21351 and 21357?

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 21351 and 21357 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21351 and 21357, than apply into the LCM equation.

GCF(21351,21357) = 3
LCM(21351,21357) = ( 21351 × 21357) / 3
LCM(21351,21357) = 455993307 / 3
LCM(21351,21357) = 151997769

Least Common Multiple (LCM) of 21351 and 21357 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21351 and 21357. First we will calculate the prime factors of 21351 and 21357.

Prime Factorization of 21351

Prime Factorization of 21357

Now multiplying the highest exponent prime factors to calculate the LCM of 21351 and 21357.

LCM(21351,21357) = 3³ × 11¹ × 647¹ × 7¹ × 113¹
LCM(21351,21357) = 151997769