Calculate the Greatest Common Factor or GCF of 16, 320 and 500
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The instructions to find the GCF of 16, 320 and 500 are the next:
1. Decompose all numbers into prime factors
| 16 | 2 |
| 8 | 2 |
| 4 | 2 |
| 2 | 2 |
| 1 |
| 320 | 2 |
| 160 | 2 |
| 80 | 2 |
| 40 | 2 |
| 20 | 2 |
| 10 | 2 |
| 5 | 5 |
| 1 |
| 500 | 2 |
| 250 | 2 |
| 125 | 5 |
| 25 | 5 |
| 5 | 5 |
| 1 |
2. Write all numbers as the product of its prime factors
| Prime factors of 16 | = | 24 |
| Prime factors of 320 | = | 26 . 5 |
| Prime factors of 500 | = | 22 . 53 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 2
Common prime factors with the lowest exponent: 22
4. Calculate the Greatest Common Factor or GCF
Remember, to find the GCF of several numbers you must multiply the common prime factors with the lowest exponent.
GCF = 22 = 4
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