What is the Least Common Multiple of 78940 and 78955?

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 78940 and 78955 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 78940 and 78955, than apply into the LCM equation.

GCF(78940,78955) = 5
LCM(78940,78955) = ( 78940 × 78955) / 5
LCM(78940,78955) = 6232707700 / 5
LCM(78940,78955) = 1246541540

Least Common Multiple (LCM) of 78940 and 78955 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 78940 and 78955. First we will calculate the prime factors of 78940 and 78955.

Prime Factorization of 78940

Prime Factorization of 78955

Now multiplying the highest exponent prime factors to calculate the LCM of 78940 and 78955.

LCM(78940,78955) = 2² × 5¹ × 3947¹ × 15791¹
LCM(78940,78955) = 1246541540