What is the Least Common Multiple of 21340 and 21360?

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 21340 and 21360 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21340 and 21360, than apply into the LCM equation.

GCF(21340,21360) = 20
LCM(21340,21360) = ( 21340 × 21360) / 20
LCM(21340,21360) = 455822400 / 20
LCM(21340,21360) = 22791120

Least Common Multiple (LCM) of 21340 and 21360 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21340 and 21360. First we will calculate the prime factors of 21340 and 21360.

Prime Factorization of 21340

Prime Factorization of 21360

Now multiplying the highest exponent prime factors to calculate the LCM of 21340 and 21360.

LCM(21340,21360) = 2⁴ × 5¹ × 11¹ × 97¹ × 3¹ × 89¹
LCM(21340,21360) = 22791120