Calculate the Greatest Common Factor or GCF of 648
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The instructions to find the GCF of 648 are the next:
1. Decompose all numbers into prime factors
648 | 2 |
324 | 2 |
162 | 2 |
81 | 3 |
27 | 3 |
9 | 3 |
3 | 3 |
1 |
2. Write all numbers as the product of its prime factors
Prime factors of 648 | = | 23 . 34 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 2 , 3
Common prime factors with the lowest exponent: 23, 34
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 = 23. 34 = 648
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