Least Common Multiple (LCM) of 81 and 169
The least common multiple (LCM) of 81 and 169 is 13689.
What is the Least Common Multiple (LCM)?
The LCM of two integers is the smallest positive integer that is divisible by both numbers. It is often used to find common denominators and solve problems involving periodic events.
Formula for LCM
The LCM of two numbers can be calculated using their GCD:
LCM(a, b) = |a × b| ÷ GCD(a, b)
How to Calculate the LCM of 81 and 169?
First, calculate the GCD of 81 and 169 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 81 ÷ 169 = 0 remainder 81 |
| 2 | 169 ÷ 81 = 2 remainder 7 |
| 3 | 81 ÷ 7 = 11 remainder 4 |
| 4 | 7 ÷ 4 = 1 remainder 3 |
| 5 | 4 ÷ 3 = 1 remainder 1 |
| 6 | 3 ÷ 1 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 181 and 130 | 23530 |
| 103 and 183 | 18849 |
| 118 and 80 | 4720 |
| 28 and 34 | 476 |
| 39 and 101 | 3939 |