Q: What is the number called when all its factors add up to twice the number?

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No. Square roots are listed once.

100 has nine factors: 1, 2, 4, 5, 10, 20, 25, 50, 100.

When the "factors" of a number are listed, the list is usually restricted to positive factors. Then there would be no answer to the question, because no group of positive numbers can add up to make zero.

6

Each integer has a finite number of factors and an infinite number of multiples.

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It is called a perfect number.

No. Square roots are listed once.

In a perfect number, the sum of all the factors (including the number itself) is twice the number. E.g., the sum of the factors of 6 is 1 + 2 + 3 + 6 = 12 (equal to 2 x 6). Every prime number has two factors: 1, and itself. So, the sum of the factors is only one more than the prime number itself; for any number greater than 1, this can't be twice the number. For example, the prime number 7 has the factors 1 and 7, which add up to 8.

My number is 11.

100 has nine factors: 1, 2, 4, 5, 10, 20, 25, 50, 100.

A number whose proper factors add up to less than the number is called deficient. 99 is a deficient number because the sum of its proper factors (1, 3, 9, 11, and 33) is 57.

1. List all factors of number (including 1 and the number, list each factor only once even if it goes in multiple times) 2. Add up all the factors 3. If the sum is equal to twice the original number, then the original number is perfect, if not, it is not perfect.

The number is 6.

If you add together all the factors of the number six, you will get an answer of 12:1+2+3+6=12

You are 9.

no 11 is not a perfect number because when u add the factors the don't add up to 11

First to be able to find an abundant number you have find all the factors of any number. Then add them all up. If the total is bigger than the number you found out the factors of then it is an abundant number and if the total is less than the number you found out the factors for it is a deficiant number and finally if the total is the same number as the one you found out the factors for it is called a perfect number. Thanks for learning from me. I hope you have understood what i have typed. Bye!