Least Common Multiple (LCM) of 61 and 169
The least common multiple (LCM) of 61 and 169 is 10309.
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 61 and 169?
First, calculate the GCD of 61 and 169 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 61 ÷ 169 = 0 remainder 61 |
| 2 | 169 ÷ 61 = 2 remainder 47 |
| 3 | 61 ÷ 47 = 1 remainder 14 |
| 4 | 47 ÷ 14 = 3 remainder 5 |
| 5 | 14 ÷ 5 = 2 remainder 4 |
| 6 | 5 ÷ 4 = 1 remainder 1 |
| 7 | 4 ÷ 1 = 4 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 47 and 64 | 3008 |
| 128 and 140 | 4480 |
| 137 and 185 | 25345 |
| 100 and 85 | 1700 |
| 174 and 136 | 11832 |