What is the Least Common Multiple of 21640 and 21653?

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 21640 and 21653 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21640 and 21653, than apply into the LCM equation.

GCF(21640,21653) = 1
LCM(21640,21653) = ( 21640 × 21653) / 1
LCM(21640,21653) = 468570920 / 1
LCM(21640,21653) = 468570920

Least Common Multiple (LCM) of 21640 and 21653 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21640 and 21653. First we will calculate the prime factors of 21640 and 21653.

Prime Factorization of 21640

Prime Factorization of 21653

Now multiplying the highest exponent prime factors to calculate the LCM of 21640 and 21653.

LCM(21640,21653) = 2³ × 5¹ × 541¹ × 59¹ × 367¹
LCM(21640,21653) = 468570920