What is the Least Common Multiple of 39995 and 40015?

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 39995 and 40015 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 39995 and 40015, than apply into the LCM equation.

GCF(39995,40015) = 5
LCM(39995,40015) = ( 39995 × 40015) / 5
LCM(39995,40015) = 1600399925 / 5
LCM(39995,40015) = 320079985

Least Common Multiple (LCM) of 39995 and 40015 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 39995 and 40015. First we will calculate the prime factors of 39995 and 40015.

Prime Factorization of 39995

Prime Factorization of 40015

Now multiplying the highest exponent prime factors to calculate the LCM of 39995 and 40015.

LCM(39995,40015) = 5¹ × 19¹ × 421¹ × 53¹ × 151¹
LCM(39995,40015) = 320079985