What is the Least Common Multiple of 7880 and 7900?

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 of 7880 and 7900 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7880 and 7900, than apply into the LCM equation.

GCF(7880,7900) = 20
LCM(7880,7900) = ( 7880 × 7900) / 20
LCM(7880,7900) = 62252000 / 20
LCM(7880,7900) = 3112600

Least Common Multiple (LCM) of 7880 and 7900 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 7880 and 7900. First we will calculate the prime factors of 7880 and 7900.

Prime Factorization of 7880

Prime Factorization of 7900

Now multiplying the highest exponent prime factors to calculate the LCM of 7880 and 7900.

LCM(7880,7900) = 2³ × 5² × 197¹ × 79¹
LCM(7880,7900) = 3112600