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What is the Least Common Multiple of 1403 and 1422?

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 1403 and 1422 is 1995066.

LCM(1403,1422) = 1995066

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Least Common Multiple of 1403 and 1422 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1403 and 1422, than apply into the LCM equation.

GCF(1403,1422) = 1
LCM(1403,1422) = ( 1403 × 1422) / 1
LCM(1403,1422) = 1995066 / 1
LCM(1403,1422) = 1995066

Least Common Multiple (LCM) of 1403 and 1422 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1403 and 1422. First we will calculate the prime factors of 1403 and 1422.

Prime Factorization of 1403

Prime factors of 1403 are 23, 61. Prime factorization of 1403 in exponential form is:

1403 = 231 × 611

Prime Factorization of 1422

Prime factors of 1422 are 2, 3, 79. Prime factorization of 1422 in exponential form is:

1422 = 21 × 32 × 791

Now multiplying the highest exponent prime factors to calculate the LCM of 1403 and 1422.

LCM(1403,1422) = 231 × 611 × 21 × 32 × 791
LCM(1403,1422) = 1995066