They are: 1, 2, 4, 8, 16, 32, 64, 128, 256.
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64, 128, 192, 256, 320, 384, 448 +64 . . .
Just 2
All these numbers go into 768 evenly: 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 128, 192, 256, 384, 768.
256, 512, 768, 1024, 1280, 1536, 1792 +256 . . .
The GCF is the largest number that is a common factor to two or more numbers. Step 1: Factor completely both numbers. Step 2: All of the factors that are common are multiplied together to obtain the GCF. 108: 2*2*3*3*3 256: 2*2*2*2*2*2*2*2 Common numbers in both: 2 & 2; so GCF is 2*2 = 4.