What is the Least Common Multiple of 81005 and 81015?

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 81005 and 81015 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 81005 and 81015, than apply into the LCM equation.

GCF(81005,81015) = 5
LCM(81005,81015) = ( 81005 × 81015) / 5
LCM(81005,81015) = 6562620075 / 5
LCM(81005,81015) = 1312524015

Least Common Multiple (LCM) of 81005 and 81015 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 81005 and 81015. First we will calculate the prime factors of 81005 and 81015.

Prime Factorization of 81005

Prime Factorization of 81015

Now multiplying the highest exponent prime factors to calculate the LCM of 81005 and 81015.

LCM(81005,81015) = 5¹ × 17¹ × 953¹ × 3¹ × 11¹ × 491¹
LCM(81005,81015) = 1312524015