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What is the Least Common Multiple of 28509 and 28520?

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 (LCM) of 28509 and 28520 is 813076680.

LCM(28509,28520) = 813076680

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Least Common Multiple of 28509 and 28520 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 28509 and 28520, than apply into the LCM equation.

GCF(28509,28520) = 1
LCM(28509,28520) = ( 28509 × 28520) / 1
LCM(28509,28520) = 813076680 / 1
LCM(28509,28520) = 813076680

Least Common Multiple (LCM) of 28509 and 28520 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 28509 and 28520. First we will calculate the prime factors of 28509 and 28520.

Prime Factorization of 28509

Prime factors of 28509 are 3, 13, 17, 43. Prime factorization of 28509 in exponential form is:

28509 = 31 × 131 × 171 × 431

Prime Factorization of 28520

Prime factors of 28520 are 2, 5, 23, 31. Prime factorization of 28520 in exponential form is:

28520 = 23 × 51 × 231 × 311

Now multiplying the highest exponent prime factors to calculate the LCM of 28509 and 28520.

LCM(28509,28520) = 31 × 131 × 171 × 431 × 23 × 51 × 231 × 311
LCM(28509,28520) = 813076680