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What is the Least Common Multiple of 7928 and 7940?

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 7928 and 7940 is 15737080.

LCM(7928,7940) = 15737080

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Least Common Multiple of 7928 and 7940 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7928 and 7940, than apply into the LCM equation.

GCF(7928,7940) = 4
LCM(7928,7940) = ( 7928 × 7940) / 4
LCM(7928,7940) = 62948320 / 4
LCM(7928,7940) = 15737080

Least Common Multiple (LCM) of 7928 and 7940 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 7928 and 7940. First we will calculate the prime factors of 7928 and 7940.

Prime Factorization of 7928

Prime factors of 7928 are 2, 991. Prime factorization of 7928 in exponential form is:

7928 = 23 × 9911

Prime Factorization of 7940

Prime factors of 7940 are 2, 5, 397. Prime factorization of 7940 in exponential form is:

7940 = 22 × 51 × 3971

Now multiplying the highest exponent prime factors to calculate the LCM of 7928 and 7940.

LCM(7928,7940) = 23 × 9911 × 51 × 3971
LCM(7928,7940) = 15737080