What is the Least Common Multiple of 1 and 5?

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 1 and 5 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1 and 5, than apply into the LCM equation.

GCF(1,5) = 1
LCM(1,5) = ( 1 × 5) / 1
LCM(1,5) = 5 / 1
LCM(1,5) = 5

Least Common Multiple (LCM) of 1 and 5 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1 and 5. First we will calculate the prime factors of 1 and 5.

Prime Factorization of 5

Now multiplying the highest exponent prime factors to calculate the LCM of 1 and 5.

LCM(1,5) = 5¹
LCM(1,5) = 5