LCM( 64, 70, 90, 46 ) = 463680
Step 1 : Write the given numbers in a horizontal line.
64 | 70 | 90 | 46 |
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 | 64 | 70 | 90 | 46 |
32 | 35 | 45 | 23 |
Step 3 : Continue dividing by prime numbers till we get 1 in all columns.
2 | 64 | 70 | 90 | 46 |
2 | 32 | 35 | 45 | 23 |
2 | 16 | 35 | 45 | 23 |
2 | 8 | 35 | 45 | 23 |
2 | 4 | 35 | 45 | 23 |
2 | 2 | 35 | 45 | 23 |
3 | 1 | 35 | 45 | 23 |
3 | 1 | 35 | 15 | 23 |
5 | 1 | 35 | 5 | 23 |
7 | 1 | 7 | 1 | 23 |
23 | 1 | 1 | 1 | 23 |
1 | 1 | 1 | 1 |
Step 4 : Multiply numbers in first column to get LCM.
LCM( 64, 70, 90, 46 ) = 2 · 2 · 2 · 2 · 2 · 2 · 3 · 3 · 5 · 7 · 23 = 463680 .