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What is the Least Common Multiple of 1509 and 1521?

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 1509 and 1521 is 765063.

LCM(1509,1521) = 765063

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Least Common Multiple of 1509 and 1521 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1509 and 1521, than apply into the LCM equation.

GCF(1509,1521) = 3
LCM(1509,1521) = ( 1509 × 1521) / 3
LCM(1509,1521) = 2295189 / 3
LCM(1509,1521) = 765063

Least Common Multiple (LCM) of 1509 and 1521 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1509 and 1521. First we will calculate the prime factors of 1509 and 1521.

Prime Factorization of 1509

Prime factors of 1509 are 3, 503. Prime factorization of 1509 in exponential form is:

1509 = 31 × 5031

Prime Factorization of 1521

Prime factors of 1521 are 3, 13. Prime factorization of 1521 in exponential form is:

1521 = 32 × 132

Now multiplying the highest exponent prime factors to calculate the LCM of 1509 and 1521.

LCM(1509,1521) = 32 × 5031 × 132
LCM(1509,1521) = 765063