2x2x2x5
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The longest factor string is 2x2x2x3x13. It is always best to list your factor string from the least to greatest number.
The longest factor string of 100 is: 2*2*5*5=100
Since 40 is a factor of 280, it is automatically the GCF.
Yes, 10 is a factor of 40 because 40 is divisible by 10.
The answer is 2x5x5 or 2x 5 to the 2nd power