Least Common Multiple of 68 and 70

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

Free LCM Calculator determines the least common multiple (LCM) between 68 and 70 the smallest integer that is 2380 that is divisible by both numbers.

Least Common Multiple (LCM) of 68 and 70 is 2380.

LCM(68,70) = 2380

LCM of 68 and 70

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

LCM of:
and

Least Common Multiple of 68 and 70

LCM of 68 and 70 is 2380

Least common multiple can be found by multiplying the highest exponent prime factors of 68 and 70. First we will calculate the prime factors of 68 and 70.

Prime Factorization of 68


2 68
2 34
17 17
1

Prime factors of 68 are 2,17. Prime factorization of 68 in exponential form is:

68 = 22×171

Prime Factorization of 70


2 70
5 35
7 7
1

Prime factors of 70 are 2, 5,7. Prime factorization of 70 in exponential form is:

70 = 21×51×71

Now multiplying the highest exponent prime factors to calculate the LCM of 68 and 70.

LCM(68,70) = 22×51×71×171
LCM(68,70) = 2380

Factors of 68

List of positive integer factors of 68 that divides 68 without a remainder.

1, 2, 4, 17, 34, 68

Factors of 70

List of positive integer factors of 70 that divides 70 without a remainder.

1, 2, 5, 7, 10, 14, 35, 70

Least Common Multiple of 68 and 70 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 68 and 70, than apply into the LCM equation.

GCF(68,70) = 2
LCM(68,70) = ( 68 × 70) / 2
LCM(68,70) = 4760 / 2
LCM(68,70) = 2380

Properties of LCM 68 and 70

(i) The LCM of 70 and 68 is associative

LCM of 68 and 70 = LCM of 70 and 68

Related Least Common Multiples of 68

Related Least Common Multiples of 70

Frequently Asked Questions on LCM of 68 and 70

1. What is the LCM of 68 and 70?

Answer: LCM of 68 and 70 is 2380.

2. What are the Factors of 68?

Answer: Factors of 68 are 1, 2, 4, 17, 34, 68. There are 6 integers that are factors of 68. The greatest factor of 68 is 68.

3. What are the Factors of 70?

Answer: Factors of 70 are 1, 2, 5, 7, 10, 14, 35, 70. There are 8 integers that are factors of 70. The greatest factor of 70 is 70.

4. How to Find the LCM of 68 and 70?

Answer:

Least Common Multiple of 68 and 70 = 2380

Step 1: Find the prime factorization of 68

68 = 2 x 2 x 17

Step 2: Find the prime factorization of 70

70 = 2 x 5 x 7

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

LCM = 2380 = 2 x 2 x 5 x 7 x 17

Step 4: Therefore, the least common multiple of 68 and 70 is 2380.