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Q: Numbers that are always factors of every number are?

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No, square numbers have an odd number of factors.

No. Consider 15: 1,3,5,15 Every positive whole number has an even number of factors, unless the number is a perfect square.

But you do know the factors of prime numbers. Every prime number has two factors: one and the number itself.

The concept of factors makes sense in the context of whole numbers. In the context of other numbers, every number is divisible by every non-zero number.

Every product of two prime numbers has four factors.

Every number greater than 1 has the two factors 1 and the number itself.

All numbers have factors. Some numbers have some of the same factors as other numbers. These are known as common factors. Since every number has 1 as a factor, 1 is always the least common factor of any set of integers.

When you multiply numbers together, the factors of the product are the factors of all of the multiplicands, and every even number includes at least one factor of 2.

1 and the number itself. They are factors of every number. ex. 1 and 2 are factors of 2. Just as 1 and 71 are factors of 71.

Every one of them has an even number of factors.

All non prime numbers have factors that are primes.

No, prime numbers do not have proper factors.

Every even number has odd and even factors.

Every integer has its own unique set of factors.

Every number except the number 1 has at least two factors, 1 and the number itself. Prime numbers have exactly two factors and composite numbers have more than two factors. All even numbers except the number 2 are composite numbers and have more than two factors. The number 2 is prime and its only factors are 1 and 2.

1 and 2 are common factors to even numbers

Every number has at least two factors . . . itself, and the number ' 1 ' .If those are the only factors it has, and no others, then it's a prime number.

No, composite numbers are the numbers having more than three factors

' 1 ' and itself.

If two whole numbers can be multiplied to give a whole number, then those two numbers are factors.Since every whole number can be expressed as a product of itself and the number 1, 1 and the number itself are factors of every number.One is.

At least two factors because prime numbers have two factors and composite numbers have more than two factors.

878 three digit numbers have an even number of factors. Every factor of a number has a pair, so there ought to be an even number of factors for every number. However, if a pair of the factors are the same number, then there will be an odd number of factors, that is if the number is a perfect square. Assuming three digit numbers are 100 to 999: From 100 to 999, the perfect squares are 102 = 100 to 312 = 961, a total of 31-10+1 = 22 numbers. So of the 999-100+1 = 900 three digit numbers, 22 have an odd number of factors, so 900-22 = 878 have an even number of factors.

Every positive integer greater than 1 can be expressed as the product of a unique set of prime factors. The count of these factors is the prime factors number for the number.

No because factors are whole numbers but every whole number except zero has 1 as a factor.

The idea of factors makes no sense when dealing with numbers other than integers because then every [non-zero] number can divide every other number.