What is the Least Common Multiple of 30620 and 30640?

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 30620 and 30640 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 30620 and 30640, than apply into the LCM equation.

GCF(30620,30640) = 20
LCM(30620,30640) = ( 30620 × 30640) / 20
LCM(30620,30640) = 938196800 / 20
LCM(30620,30640) = 46909840

Least Common Multiple (LCM) of 30620 and 30640 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 30620 and 30640. First we will calculate the prime factors of 30620 and 30640.

Prime Factorization of 30620

Prime Factorization of 30640

Now multiplying the highest exponent prime factors to calculate the LCM of 30620 and 30640.

LCM(30620,30640) = 2⁴ × 5¹ × 1531¹ × 383¹
LCM(30620,30640) = 46909840