What is the Least Common Multiple of 43978 and 43990?

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 43978 and 43990 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 43978 and 43990, than apply into the LCM equation.

GCF(43978,43990) = 2
LCM(43978,43990) = ( 43978 × 43990) / 2
LCM(43978,43990) = 1934592220 / 2
LCM(43978,43990) = 967296110

Least Common Multiple (LCM) of 43978 and 43990 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 43978 and 43990. First we will calculate the prime factors of 43978 and 43990.

Prime Factorization of 43978

Prime Factorization of 43990

Now multiplying the highest exponent prime factors to calculate the LCM of 43978 and 43990.

LCM(43978,43990) = 2¹ × 11¹ × 1999¹ × 5¹ × 53¹ × 83¹
LCM(43978,43990) = 967296110