Least Common Multiple (LCM) of 139 and 155
The least common multiple (LCM) of 139 and 155 is 21545.
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 139 and 155?
First, calculate the GCD of 139 and 155 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 139 ÷ 155 = 0 remainder 139 |
| 2 | 155 ÷ 139 = 1 remainder 16 |
| 3 | 139 ÷ 16 = 8 remainder 11 |
| 4 | 16 ÷ 11 = 1 remainder 5 |
| 5 | 11 ÷ 5 = 2 remainder 1 |
| 6 | 5 ÷ 1 = 5 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 132 and 60 | 660 |
| 30 and 115 | 690 |
| 103 and 100 | 10300 |
| 104 and 186 | 9672 |
| 189 and 20 | 3780 |