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What is the Least Common Multiple of 1900 and 1906?

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 1900 and 1906 is 1810700.

LCM(1900,1906) = 1810700

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Least Common Multiple of 1900 and 1906 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1900 and 1906, than apply into the LCM equation.

GCF(1900,1906) = 2
LCM(1900,1906) = ( 1900 × 1906) / 2
LCM(1900,1906) = 3621400 / 2
LCM(1900,1906) = 1810700

Least Common Multiple (LCM) of 1900 and 1906 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1900 and 1906. First we will calculate the prime factors of 1900 and 1906.

Prime Factorization of 1900

Prime factors of 1900 are 2, 5, 19. Prime factorization of 1900 in exponential form is:

1900 = 22 × 52 × 191

Prime Factorization of 1906

Prime factors of 1906 are 2, 953. Prime factorization of 1906 in exponential form is:

1906 = 21 × 9531

Now multiplying the highest exponent prime factors to calculate the LCM of 1900 and 1906.

LCM(1900,1906) = 22 × 52 × 191 × 9531
LCM(1900,1906) = 1810700