What is the Least Common Multiple of 78109 and 78128?

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 78109 and 78128 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 78109 and 78128, than apply into the LCM equation.

GCF(78109,78128) = 19
LCM(78109,78128) = ( 78109 × 78128) / 19
LCM(78109,78128) = 6102499952 / 19
LCM(78109,78128) = 321184208

Least Common Multiple (LCM) of 78109 and 78128 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 78109 and 78128. First we will calculate the prime factors of 78109 and 78128.

Prime Factorization of 78109

Prime Factorization of 78128

Now multiplying the highest exponent prime factors to calculate the LCM of 78109 and 78128.

LCM(78109,78128) = 19¹ × 4111¹ × 2⁴ × 257¹
LCM(78109,78128) = 321184208