Least Common Multiple of 69 and 80

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

Free LCM Calculator determines the least common multiple (LCM) between 69 and 80 the smallest integer that is 5520 that is divisible by both numbers.

Least Common Multiple (LCM) of 69 and 80 is 5520.

LCM(69,80) = 5520

LCM of 69 and 80

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

LCM of:
and

Least Common Multiple of 69 and 80

LCM of 69 and 80 is 5520

Least common multiple can be found by multiplying the highest exponent prime factors of 69 and 80. First we will calculate the prime factors of 69 and 80.

Prime Factorization of 69


3 69
23 23
1

Prime factors of 69 are 3,23. Prime factorization of 69 in exponential form is:

69 = 31×231

Prime Factorization of 80


2 80
2 40
2 20
2 10
5 5
1

Prime factors of 80 are 2,5. Prime factorization of 80 in exponential form is:

80 = 24×51

Now multiplying the highest exponent prime factors to calculate the LCM of 69 and 80.

LCM(69,80) = 24×31×51×231
LCM(69,80) = 5520

Factors of 69

List of positive integer factors of 69 that divides 69 without a remainder.

1, 3, 23, 69

Factors of 80

List of positive integer factors of 80 that divides 80 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 40, 80

Least Common Multiple of 69 and 80 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 69 and 80, than apply into the LCM equation.

GCF(69,80) = 1
LCM(69,80) = ( 69 × 80) / 1
LCM(69,80) = 5520 / 1
LCM(69,80) = 5520

Properties of LCM 69 and 80

(i) The LCM of 80 and 69 is associative

LCM of 69 and 80 = LCM of 80 and 69

Related Least Common Multiples of 69

Related Least Common Multiples of 80

Frequently Asked Questions on LCM of 69 and 80

1. What is the LCM of 69 and 80?

Answer: LCM of 69 and 80 is 5520.

2. What are the Factors of 69?

Answer: Factors of 69 are 1, 3, 23, 69. There are 4 integers that are factors of 69. The greatest factor of 69 is 69.

3. What are the Factors of 80?

Answer: Factors of 80 are 1, 2, 4, 5, 8, 10, 16, 20, 40, 80. There are 10 integers that are factors of 80. The greatest factor of 80 is 80.

4. How to Find the LCM of 69 and 80?

Answer:

Least Common Multiple of 69 and 80 = 5520

Step 1: Find the prime factorization of 69

69 = 3 x 23

Step 2: Find the prime factorization of 80

80 = 2 x 2 x 2 x 2 x 5

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

LCM = 5520 = 2 x 2 x 2 x 2 x 3 x 5 x 23

Step 4: Therefore, the least common multiple of 69 and 80 is 5520.