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What is the Least Common Multiple of 28555 and 28570?

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 28555 and 28570 is 163163270.

LCM(28555,28570) = 163163270

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Least Common Multiple of 28555 and 28570 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 28555 and 28570, than apply into the LCM equation.

GCF(28555,28570) = 5
LCM(28555,28570) = ( 28555 × 28570) / 5
LCM(28555,28570) = 815816350 / 5
LCM(28555,28570) = 163163270

Least Common Multiple (LCM) of 28555 and 28570 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 28555 and 28570. First we will calculate the prime factors of 28555 and 28570.

Prime Factorization of 28555

Prime factors of 28555 are 5, 5711. Prime factorization of 28555 in exponential form is:

28555 = 51 × 57111

Prime Factorization of 28570

Prime factors of 28570 are 2, 5, 2857. Prime factorization of 28570 in exponential form is:

28570 = 21 × 51 × 28571

Now multiplying the highest exponent prime factors to calculate the LCM of 28555 and 28570.

LCM(28555,28570) = 51 × 57111 × 21 × 28571
LCM(28555,28570) = 163163270