As a product of its prime factors: 2*11 = 22. The other factor pair is 1*22.
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The factor pairs of 66 are:66,133,222,311,6(1, 66)(2, 33)(3, 22)(6, 11)
the pairs are 10, 3 ,22 just in case you can look at he discussion board you don't have too
The factor pairs of 57 are 3x19 and 1x57
The factor pairs of 343 are (343,1) and (49,7)
20 has 3 factor pairs. Pairs are (1,20), (2,10) and (9,9)