What is the Least Common Multiple of 31970 and 31985?

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 31970 and 31985 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 31970 and 31985, than apply into the LCM equation.

GCF(31970,31985) = 5
LCM(31970,31985) = ( 31970 × 31985) / 5
LCM(31970,31985) = 1022560450 / 5
LCM(31970,31985) = 204512090

Least Common Multiple (LCM) of 31970 and 31985 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 31970 and 31985. First we will calculate the prime factors of 31970 and 31985.

Prime Factorization of 31970

Prime Factorization of 31985

Now multiplying the highest exponent prime factors to calculate the LCM of 31970 and 31985.

LCM(31970,31985) = 2¹ × 5¹ × 23¹ × 139¹ × 6397¹
LCM(31970,31985) = 204512090