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Prime numbers are numbers with no common factors but one and itself.

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Those numbers are co-prime.

Q: What is the name of the numbers with no common factor except 1?

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5 and 10 5 and 15 5 and 20

200,205, 10

The numbers divisible by 2 are called the even numbers. There is no special name for "all even numbers except 2".

18.

All square numbers greater than 1 are composite.

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All numbers with a least common multiple, have that multiple as a factor.

Two Numbers That Have The Greatest Common Factor Of Eight Are: 16 and 56

The greatest common factor for the numbers 3 and 37 is 1.

coprime

8 and 16

In that case, the smaller number is a factor of the larger one. The larger one is a multiple of the smaller one.

Another name for the least common factor is 1.

I thick it is 27 and 81

5 and 10 5 and 15 5 and 20

200,205, 10

The greatest common divisor is another name for the greatest common factor (GCF) and refers to the largest number that will divide into two or more numbers evenly with no remainder.

27 and 81 are a possibility. Also numbers like 5 and 10, 20 and 40.