What is the Least Common Multiple of 21699 and 21717?

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 21699 and 21717 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21699 and 21717, than apply into the LCM equation.

GCF(21699,21717) = 9
LCM(21699,21717) = ( 21699 × 21717) / 9
LCM(21699,21717) = 471237183 / 9
LCM(21699,21717) = 52359687

Least Common Multiple (LCM) of 21699 and 21717 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21699 and 21717. First we will calculate the prime factors of 21699 and 21717.

Prime Factorization of 21699

Prime Factorization of 21717

Now multiplying the highest exponent prime factors to calculate the LCM of 21699 and 21717.

LCM(21699,21717) = 3² × 2411¹ × 19¹ × 127¹
LCM(21699,21717) = 52359687