What is the Least Common Multiple of 19951 and 19970?

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 19951 and 19970 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 19951 and 19970, than apply into the LCM equation.

GCF(19951,19970) = 1
LCM(19951,19970) = ( 19951 × 19970) / 1
LCM(19951,19970) = 398421470 / 1
LCM(19951,19970) = 398421470

Least Common Multiple (LCM) of 19951 and 19970 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 19951 and 19970. First we will calculate the prime factors of 19951 and 19970.

Prime Factorization of 19951

Prime Factorization of 19970

Now multiplying the highest exponent prime factors to calculate the LCM of 19951 and 19970.

LCM(19951,19970) = 71¹ × 281¹ × 2¹ × 5¹ × 1997¹
LCM(19951,19970) = 398421470