What is the Least Common Multiple of 21403 and 21419?

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 21403 and 21419 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21403 and 21419, than apply into the LCM equation.

GCF(21403,21419) = 1
LCM(21403,21419) = ( 21403 × 21419) / 1
LCM(21403,21419) = 458430857 / 1
LCM(21403,21419) = 458430857

Least Common Multiple (LCM) of 21403 and 21419 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21403 and 21419. First we will calculate the prime factors of 21403 and 21419.

Prime Factorization of 21403

Prime Factorization of 21419

Now multiplying the highest exponent prime factors to calculate the LCM of 21403 and 21419.

LCM(21403,21419) = 17¹ × 1259¹ × 21419¹
LCM(21403,21419) = 458430857