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What is the Least Common Multiple of 15648 and 15660?

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 15648 and 15660 is 20420640.

LCM(15648,15660) = 20420640

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Least Common Multiple of 15648 and 15660 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 15648 and 15660, than apply into the LCM equation.

GCF(15648,15660) = 12
LCM(15648,15660) = ( 15648 × 15660) / 12
LCM(15648,15660) = 245047680 / 12
LCM(15648,15660) = 20420640

Least Common Multiple (LCM) of 15648 and 15660 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 15648 and 15660. First we will calculate the prime factors of 15648 and 15660.

Prime Factorization of 15648

Prime factors of 15648 are 2, 3, 163. Prime factorization of 15648 in exponential form is:

15648 = 25 × 31 × 1631

Prime Factorization of 15660

Prime factors of 15660 are 2, 3, 5, 29. Prime factorization of 15660 in exponential form is:

15660 = 22 × 33 × 51 × 291

Now multiplying the highest exponent prime factors to calculate the LCM of 15648 and 15660.

LCM(15648,15660) = 25 × 33 × 1631 × 51 × 291
LCM(15648,15660) = 20420640