What is the Least Common Multiple of 61970 and 61978?

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 61970 and 61978 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 61970 and 61978, than apply into the LCM equation.

GCF(61970,61978) = 2
LCM(61970,61978) = ( 61970 × 61978) / 2
LCM(61970,61978) = 3840776660 / 2
LCM(61970,61978) = 1920388330

Least Common Multiple (LCM) of 61970 and 61978 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 61970 and 61978. First we will calculate the prime factors of 61970 and 61978.

Prime Factorization of 61970

Prime Factorization of 61978

Now multiplying the highest exponent prime factors to calculate the LCM of 61970 and 61978.

LCM(61970,61978) = 2¹ × 5¹ × 6197¹ × 7¹ × 19¹ × 233¹
LCM(61970,61978) = 1920388330