What is the Least Common Multiple of 7640 and 7658?

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 7640 and 7658 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7640 and 7658, than apply into the LCM equation.

GCF(7640,7658) = 2
LCM(7640,7658) = ( 7640 × 7658) / 2
LCM(7640,7658) = 58507120 / 2
LCM(7640,7658) = 29253560

Least Common Multiple (LCM) of 7640 and 7658 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 7640 and 7658. First we will calculate the prime factors of 7640 and 7658.

Prime Factorization of 7640

Prime Factorization of 7658

Now multiplying the highest exponent prime factors to calculate the LCM of 7640 and 7658.

LCM(7640,7658) = 2³ × 5¹ × 191¹ × 7¹ × 547¹
LCM(7640,7658) = 29253560