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What is the Least Common Multiple of 1478 and 1490?

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 1478 and 1490 is 1101110.

LCM(1478,1490) = 1101110

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Least Common Multiple of 1478 and 1490 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1478 and 1490, than apply into the LCM equation.

GCF(1478,1490) = 2
LCM(1478,1490) = ( 1478 × 1490) / 2
LCM(1478,1490) = 2202220 / 2
LCM(1478,1490) = 1101110

Least Common Multiple (LCM) of 1478 and 1490 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1478 and 1490. First we will calculate the prime factors of 1478 and 1490.

Prime Factorization of 1478

Prime factors of 1478 are 2, 739. Prime factorization of 1478 in exponential form is:

1478 = 21 × 7391

Prime Factorization of 1490

Prime factors of 1490 are 2, 5, 149. Prime factorization of 1490 in exponential form is:

1490 = 21 × 51 × 1491

Now multiplying the highest exponent prime factors to calculate the LCM of 1478 and 1490.

LCM(1478,1490) = 21 × 7391 × 51 × 1491
LCM(1478,1490) = 1101110