What is the Least Common Multiple of 81460 and 81470?

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 81460 and 81470 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 81460 and 81470, than apply into the LCM equation.

GCF(81460,81470) = 10
LCM(81460,81470) = ( 81460 × 81470) / 10
LCM(81460,81470) = 6636546200 / 10
LCM(81460,81470) = 663654620

Least Common Multiple (LCM) of 81460 and 81470 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 81460 and 81470. First we will calculate the prime factors of 81460 and 81470.

Prime Factorization of 81460

Prime Factorization of 81470

Now multiplying the highest exponent prime factors to calculate the LCM of 81460 and 81470.

LCM(81460,81470) = 2² × 5¹ × 4073¹ × 8147¹
LCM(81460,81470) = 663654620