The prime factors of 4123 are 7, 19 and 31
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123 123 123
Only the number 1 goes into both 43 & 123... because 43 is a prime number.
There is no such pair.
well any multiple of 123 would be divisable by 123. Ex 123,246,369,492,615,738... but if your asking what 123 can be divided by its' 1 and itself, therefore making it a prime number 177
123 is a composite number because it is divisible by 3. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1, 2, and 0. 1, 2, and 0 have a different name.