Calculate the Greatest Common Factor or GCF of 636
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The instructions to find the GCF of 636 are the next:
1. Decompose all numbers into prime factors
| 636 | 2 |
| 318 | 2 |
| 159 | 3 |
| 53 | 53 |
| 1 |
2. Write all numbers as the product of its prime factors
| Prime factors of 636 | = | 22 . 3 . 53 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 2 , 3 , 53
Common prime factors with the lowest exponent: 22, 31, 531
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. 31. 531 = 636
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