What is the Least Common Multiple of 21729 and 21739?

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 21729 and 21739 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21729 and 21739, than apply into the LCM equation.

GCF(21729,21739) = 1
LCM(21729,21739) = ( 21729 × 21739) / 1
LCM(21729,21739) = 472366731 / 1
LCM(21729,21739) = 472366731

Least Common Multiple (LCM) of 21729 and 21739 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21729 and 21739. First we will calculate the prime factors of 21729 and 21739.

Prime Factorization of 21729

Prime Factorization of 21739

Now multiplying the highest exponent prime factors to calculate the LCM of 21729 and 21739.

LCM(21729,21739) = 3¹ × 7243¹ × 21739¹
LCM(21729,21739) = 472366731