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What is the Least Common Multiple of 1902 and 1917?

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 1902 and 1917 is 1215378.

LCM(1902,1917) = 1215378

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Least Common Multiple of 1902 and 1917 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1902 and 1917, than apply into the LCM equation.

GCF(1902,1917) = 3
LCM(1902,1917) = ( 1902 × 1917) / 3
LCM(1902,1917) = 3646134 / 3
LCM(1902,1917) = 1215378

Least Common Multiple (LCM) of 1902 and 1917 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1902 and 1917. First we will calculate the prime factors of 1902 and 1917.

Prime Factorization of 1902

Prime factors of 1902 are 2, 3, 317. Prime factorization of 1902 in exponential form is:

1902 = 21 × 31 × 3171

Prime Factorization of 1917

Prime factors of 1917 are 3, 71. Prime factorization of 1917 in exponential form is:

1917 = 33 × 711

Now multiplying the highest exponent prime factors to calculate the LCM of 1902 and 1917.

LCM(1902,1917) = 21 × 33 × 3171 × 711
LCM(1902,1917) = 1215378