The factors of -160 are 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, -1, -2, -4, -5, -8, -10, -16, -20, -32, -40, -80, -160
The prime factors are 2 and 5.
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160 and 189 are relatively prime as they have no common factors other than 1.
25 x 5
compositeYes 160 is a composite number
30 does.
I found 105,63 and 27