321 is made solely from three consecutive numbers so it can be evenly divided by 3.
 321 is a composite number.
 Prime factorization: 321 = 3 x 107
 The exponents in the prime factorization are 1 and 1. Adding one to each and multiplying we get (1 + 1)(1 + 1) = 2 x 2 = 4. Therefore 321 has exactly 4 factors.
 Factors of 321: 1, 3, 107, 321
 Factor pairs: 321 = 1 x 321 or 3 x 107
 321 has no square factors that allow its square root to be simplified. √321 ≈ 17.916
Print the puzzles or type the factors on this excel file: 10 Factors 20141208

I heard the bells on Christmas dayTheir old familiar carols play,And wild and sweet the words repeatOf peace on earth, good will to men.

I thought how, as the day had come,The belfries of all ChristendomHad rolled along th’unbroken songOf peace on earth, good will to men.

And in despair I bowed my head:“There is no peace on earth,” I said,“For hate is strong and mocks the songOf peace on earth, good will to men.”

Then pealed the bells more loud and deep:“God is not dead, nor doth he sleep;The wrong shall fail, the right prevail,With peace on earth, good will to men.”

Till, ringing, singing, on its way,The world revolved from night to day,A voice, a chime, a chant sublime,Of peace on earth, good will to men!
Text: Henry Wadsworth Longfellow, 18071882
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Okay, I hear my husband coming in from clearing the snow, but I managed to do my first findthefactor puzzle. I started with a level two, the one with number 319, flew through that and a the level four on this page, then was humbled by the level five, Finished it in time to be signing off. Spoiler alert…the top row is 5 2 1 10 6 4 9 8 3 7 right? Fun!
Yes.
I design the puzzles to have only one solution so you can be sure that if the factors you find work, then you have found the correct solution. About a week after I publish the puzzles, I update the posts with either the correct factors or a table showing a way to arrive at the correct solution logically.