Least Common Multiple of 20 and 34

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

Free LCM Calculator determines the least common multiple (LCM) between 20 and 34 the smallest integer that is 340 that is divisible by both numbers.

Least Common Multiple (LCM) of 20 and 34 is 340.

LCM(20,34) = 340

LCM of 20 and 34

Least common multiple or lowest common denominator (LCD) can be calculated in three ways;

LCM of:
and

Least Common Multiple of 20 and 34

LCM of 20 and 34 is 340

Least common multiple can be found by multiplying the highest exponent prime factors of 20 and 34. First we will calculate the prime factors of 20 and 34.

Prime Factorization of 20


2 20
2 10
5 5
1

Prime factors of 20 are 2,5. Prime factorization of 20 in exponential form is:

20 = 22×51

Prime Factorization of 34


2 34
17 17
1

Prime factors of 34 are 2,17. Prime factorization of 34 in exponential form is:

34 = 21×171

Now multiplying the highest exponent prime factors to calculate the LCM of 20 and 34.

LCM(20,34) = 22×51×171
LCM(20,34) = 340

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1, 2, 4, 5, 10, 20

Factors of 34

List of positive integer factors of 34 that divides 34 without a remainder.

1, 2, 17, 34

Least Common Multiple of 20 and 34 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20 and 34, than apply into the LCM equation.

GCF(20,34) = 2
LCM(20,34) = ( 20 × 34) / 2
LCM(20,34) = 680 / 2
LCM(20,34) = 340

Properties of LCM 20 and 34

(i) The LCM of 34 and 20 is associative

LCM of 20 and 34 = LCM of 34 and 20

Related Least Common Multiples of 20

Related Least Common Multiples of 34

Frequently Asked Questions on LCM of 20 and 34

1. What is the LCM of 20 and 34?

Answer: LCM of 20 and 34 is 340.

2. What are the Factors of 20?

Answer: Factors of 20 are 1, 2, 4, 5, 10, 20. There are 6 integers that are factors of 20. The greatest factor of 20 is 20.

3. What are the Factors of 34?

Answer: Factors of 34 are 1, 2, 17, 34. There are 4 integers that are factors of 34. The greatest factor of 34 is 34.

4. How to Find the LCM of 20 and 34?

Answer:

Least Common Multiple of 20 and 34 = 340

Step 1: Find the prime factorization of 20

20 = 2 x 2 x 5

Step 2: Find the prime factorization of 34

34 = 2 x 17

Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:

LCM = 340 = 2 x 2 x 5 x 17

Step 4: Therefore, the least common multiple of 20 and 34 is 340.