What is the Least Common Multiple of 7972 and 7980?

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 7972 and 7980 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7972 and 7980, than apply into the LCM equation.

GCF(7972,7980) = 4
LCM(7972,7980) = ( 7972 × 7980) / 4
LCM(7972,7980) = 63616560 / 4
LCM(7972,7980) = 15904140

Least Common Multiple (LCM) of 7972 and 7980 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 7972 and 7980. First we will calculate the prime factors of 7972 and 7980.

Prime Factorization of 7972

Prime Factorization of 7980

Now multiplying the highest exponent prime factors to calculate the LCM of 7972 and 7980.

LCM(7972,7980) = 2² × 1993¹ × 3¹ × 5¹ × 7¹ × 19¹
LCM(7972,7980) = 15904140