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They are: 1 times 4 = 4 or 2 times 2 = 4
4 & 6
1 and 3
8
2 x 3 x 3 x 3
6 and 2
625 and 4
19 and 4
-3 and -1
The factors of -84 that equal the sum of -16 are: -28 and 12 -14 and -2 -12 and -4
94
-4 and -9
2 and 2
2x46 4x23