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What is the Least Common Multiple of 56972 and 56990?

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 56972 and 56990 is 1623417140.

LCM(56972,56990) = 1623417140

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Least Common Multiple of 56972 and 56990 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 56972 and 56990, than apply into the LCM equation.

GCF(56972,56990) = 2
LCM(56972,56990) = ( 56972 × 56990) / 2
LCM(56972,56990) = 3246834280 / 2
LCM(56972,56990) = 1623417140

Least Common Multiple (LCM) of 56972 and 56990 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 56972 and 56990. First we will calculate the prime factors of 56972 and 56990.

Prime Factorization of 56972

Prime factors of 56972 are 2, 14243. Prime factorization of 56972 in exponential form is:

56972 = 22 × 142431

Prime Factorization of 56990

Prime factors of 56990 are 2, 5, 41, 139. Prime factorization of 56990 in exponential form is:

56990 = 21 × 51 × 411 × 1391

Now multiplying the highest exponent prime factors to calculate the LCM of 56972 and 56990.

LCM(56972,56990) = 22 × 142431 × 51 × 411 × 1391
LCM(56972,56990) = 1623417140