Menu Search
Jump to the content
X
X

Greatest Common Factor

Calculate the Greatest Common Factor or GCF of 128 and 240

Sponsors

The instructions to find the GCF of 128 and 240 are the next:

1. Decompose all numbers into prime factors

1282
642
322
162
82
42
22
1
2402
1202
602
302
153
55
1

2. Write all numbers as the product of its prime factors

Prime factors of 128=27
Prime factors of 240=24 . 3 . 5

3. Choose the common prime factors with the lowest exponent

Common prime factors: 2

Common prime factors with the lowest exponent: 24

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 = 24 = 16

Also calculates the:

Least Common Multiple or LCM of 128 and 240

↑ Back to top

↑ Back to top