2 x 2 x 2 x 3 x 3 x 5 is the longest one.
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1*2*2*2*3*3*5=360
2 x 2 x 2 x 3 x 3 x 5 = 360
what is a factor string with 1 to 144
The longest factor string is 2x2x2x3x13. It is always best to list your factor string from the least to greatest number.
7*5*4*3*2 Is the longest factor string of 840