What is the Least Common Multiple of 20998 and 21010?

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 20998 and 21010 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20998 and 21010, than apply into the LCM equation.

GCF(20998,21010) = 2
LCM(20998,21010) = ( 20998 × 21010) / 2
LCM(20998,21010) = 441167980 / 2
LCM(20998,21010) = 220583990

Least Common Multiple (LCM) of 20998 and 21010 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20998 and 21010. First we will calculate the prime factors of 20998 and 21010.

Prime Factorization of 20998

Prime Factorization of 21010

Now multiplying the highest exponent prime factors to calculate the LCM of 20998 and 21010.

LCM(20998,21010) = 2¹ × 10499¹ × 5¹ × 11¹ × 191¹
LCM(20998,21010) = 220583990