Calculate the Greatest Common Factor or GCF of 2139
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The instructions to find the GCF of 2139 are the next:
1. Decompose all numbers into prime factors
2139 | 3 |
713 | 23 |
31 | 31 |
1 |
2. Write all numbers as the product of its prime factors
Prime factors of 2139 | = | 3 . 23 . 31 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 3 , 23 , 31
Common prime factors with the lowest exponent: 31, 231, 311
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 = 31. 231. 311 = 2139
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