What is the Least Common Multiple of 890 and 905?

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 890 and 905 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 890 and 905, than apply into the LCM equation.

GCF(890,905) = 5
LCM(890,905) = ( 890 × 905) / 5
LCM(890,905) = 805450 / 5
LCM(890,905) = 161090

Least Common Multiple (LCM) of 890 and 905 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 890 and 905. First we will calculate the prime factors of 890 and 905.

Prime Factorization of 890

Prime Factorization of 905

Now multiplying the highest exponent prime factors to calculate the LCM of 890 and 905.

LCM(890,905) = 2¹ × 5¹ × 89¹ × 181¹
LCM(890,905) = 161090