What is the Least Common Multiple of 21890 and 21908?

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 21890 and 21908 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21890 and 21908, than apply into the LCM equation.

GCF(21890,21908) = 2
LCM(21890,21908) = ( 21890 × 21908) / 2
LCM(21890,21908) = 479566120 / 2
LCM(21890,21908) = 239783060

Least Common Multiple (LCM) of 21890 and 21908 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21890 and 21908. First we will calculate the prime factors of 21890 and 21908.

Prime Factorization of 21890

Prime Factorization of 21908

Now multiplying the highest exponent prime factors to calculate the LCM of 21890 and 21908.

LCM(21890,21908) = 2² × 5¹ × 11¹ × 199¹ × 5477¹
LCM(21890,21908) = 239783060