(30,1)(15,2)(10,3)(6,5)
(35,1)(7,5)
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factor pair = 36,1 factor pair = 18,2 factor pair = 12,3 factor pair = 9,4 factor pair = 6,6
A unique factor pair is a pair of factors that haven't been given already that multiply to give the original number. For instance, if I was going to work out the factors of 24, I would put 1, 2, 3, 4, 6, 8, 12 and 24.The unique factor pairs would be 1 and 24, 2 and 12, 3 and 8, 4 and 6. I could also write 8 and 3 as a factor pair, but as I've already put the reverse of this, it would not be a uniquefactor pair.
14 and 35
factor pair = 10852, 1 factor pair = 5426, 2 factor pair = 2713, 4
35 can be a factor, but it is not prime.