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What is the Least Common Multiple of 1603 and 1621?

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 1603 and 1621 is 2598463.

LCM(1603,1621) = 2598463

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Least Common Multiple of 1603 and 1621 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1603 and 1621, than apply into the LCM equation.

GCF(1603,1621) = 1
LCM(1603,1621) = ( 1603 × 1621) / 1
LCM(1603,1621) = 2598463 / 1
LCM(1603,1621) = 2598463

Least Common Multiple (LCM) of 1603 and 1621 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1603 and 1621. First we will calculate the prime factors of 1603 and 1621.

Prime Factorization of 1603

Prime factors of 1603 are 7, 229. Prime factorization of 1603 in exponential form is:

1603 = 71 × 2291

Prime Factorization of 1621

Prime factors of 1621 are 1621. Prime factorization of 1621 in exponential form is:

1621 = 16211

Now multiplying the highest exponent prime factors to calculate the LCM of 1603 and 1621.

LCM(1603,1621) = 71 × 2291 × 16211
LCM(1603,1621) = 2598463