LCM( 85, 284, 164, 215 ) = 42558820
Step 1 : Write the given numbers in a horizontal line.
85 | 284 | 164 | 215 |
Step 2 : Divide the given numbers by smallest prime number. In this example we can divide by 2.
(if any number is not divisible by 2, write it down unchanged)
2 | 85 | 284 | 164 | 215 |
85 | 142 | 82 | 215 |
Step 3 : Continue dividing by prime numbers till we get 1 in all columns.
2 | 85 | 284 | 164 | 215 |
2 | 85 | 142 | 82 | 215 |
5 | 85 | 71 | 41 | 215 |
17 | 17 | 71 | 41 | 43 |
41 | 1 | 71 | 41 | 43 |
43 | 1 | 71 | 1 | 43 |
71 | 1 | 71 | 1 | 1 |
1 | 1 | 1 | 1 |
Step 4 : Multiply numbers in first column to get LCM.
LCM( 85, 284, 164, 215 ) = 2 · 2 · 5 · 17 · 41 · 43 · 71 = 42558820 .