181 + 5 + 3
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The prime numbers (factors) of 189 are: 3 and 7
189
378 or 2*189 or 2*3*89. 89 is prime.
No, they can be divided. For example, 3 is a prime number because its only factors are 1 and 3. 80 is a prime number because it can be divided by 1, 2, 4, 8, 10, etc. 189 can be divided by 1, 3, 63, etc.
1 and 189 3 and 63 7 and 27 9 and 21