What is the Least Common Multiple of 25403 and 25420?

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 25403 and 25420 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 25403 and 25420, than apply into the LCM equation.

GCF(25403,25420) = 1
LCM(25403,25420) = ( 25403 × 25420) / 1
LCM(25403,25420) = 645744260 / 1
LCM(25403,25420) = 645744260

Least Common Multiple (LCM) of 25403 and 25420 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 25403 and 25420. First we will calculate the prime factors of 25403 and 25420.

Prime Factorization of 25403

Prime Factorization of 25420

Now multiplying the highest exponent prime factors to calculate the LCM of 25403 and 25420.

LCM(25403,25420) = 7¹ × 19¹ × 191¹ × 2² × 5¹ × 31¹ × 41¹
LCM(25403,25420) = 645744260