What is the Least Common Multiple of 6409 and 6421?

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 6409 and 6421 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 6409 and 6421, than apply into the LCM equation.

GCF(6409,6421) = 1
LCM(6409,6421) = ( 6409 × 6421) / 1
LCM(6409,6421) = 41152189 / 1
LCM(6409,6421) = 41152189

Least Common Multiple (LCM) of 6409 and 6421 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 6409 and 6421. First we will calculate the prime factors of 6409 and 6421.

Prime Factorization of 6409

Prime Factorization of 6421

Now multiplying the highest exponent prime factors to calculate the LCM of 6409 and 6421.

LCM(6409,6421) = 13¹ × 17¹ × 29¹ × 6421¹
LCM(6409,6421) = 41152189