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Q: What is the sum of even factors of a number?

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It is only possible to have one even prime factor of any number - as there is only one even prime number, 2. The sum of these is therefore 2.

39 is a composite number whose proper factors add up to 16.

36

The sum of the factors of any negative number is zero.

The sum of two odd numbers or two even numbers is an even number. The sum of an odd number and an even number is an odd number.

The sum of an odd number and an even number will always give an odd number. Ex: 2 + 5 = 7

It doesn't have to be a prime number and an even number. The sum of any two whole numbers is a whole number. Also, the sum of two even numbers is an even number, the sum of two odd numbers is an even number, and the sum of an odd number and an even number is an odd number.

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Two odd numbers always sum to an even number. Always. Two even numbers always sum to an even number, and an odd number and an even number always sum to an odd number.

No. Sum of odd + odd = even Sum of odd + even = odd Sum of even + even = even

No, the sum of a prime number and a composite number is not always even.

No, by inspection it is even (2 is one of the factors), also by sum of digits, 9 is one of the factors. Either of these is enough to show that it is not prime.

No. No matter what you use, the sum of an odd number and an even number will always be odd.

No. The sum of 1 odd number and 1 even number must always be odd.

it is 36!!! because,,, # 3+6=9 # 6x6=36 # factors are: 1 2 3 4 6 9 12 18 36= 9 factors # 36= an even number it all works so the answer is 36!

Abundant is a number for which the sum of all its proper factors is greater than the number itself. Deficient is a number for which the sum of all its proper factors is less than the number itself. Perfect is a number for which the sum of all its proper factors is the number itself.

Sum of two odd numbers are always even, and the sum of 2 even numbers are also even. The sum of an odd number & an even number are always odd.

The number four.

The number is 6.

The sum of one odd number and one even number is another odd number.

The sum of the prime factors of 6 is closest in value to the composite number 6.

The sum is 144 if 60 is included, 84 if not.

The sum of two even numbers is always an even number.

The sum of two even numbers is always an even number.

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