What is the sum of all the positive integer factors of 12?

The sum of all the positive integer factors of 12 is 28. The positive integer factors of 12 are 1, 2, 3, 4, 6 and 12, and when added together, these terms are equal to 28.

The factors of a number are the terms that can be multiplied to equal the number. The factors of 10, for example, include 2 and 5, because 2 x 5 = 10. An integer is a whole number, so a positive integer factor of a number is a positive whole number factor. The whole numbers that can be multiplied to equal 12 are 1 x 12, 2 x 6, and 3 x 4. To find the sum, calculate 1 + 2 + 3 + 4 + 6 +12 = 28.