For example, the first perfect number is 6, which is about 1, 2, 3, 6. Except itself 6, the other three numbers add up, 1+2+3 = 6. The second perfect number is 28, which is about 1, 2,4,7,14,28. Except itself 28, the other five numbers add up, 1+2+4+7+ 14 = 28. The following numbers are 496, 8 128 and so on. For example: 6 =1+2+328 =1+2+4+7+14496 =1+2+4+8+16+3.

related notion

For the number "4", its true factors are 1 and 2, and its sum is 3. Since 4 itself is greater than the sum of its true factors, such a number is called a deficit. For the number "12", its true factor is 1, 2,3,4,6, and its sum is 16. Since 12 itself is less than the sum of its true factors, such numbers are called abundant numbers. So are there any figures that are neither surplus nor deficit? That is, a number is equal to the sum of all its true factors, and such a number is called a perfect number.

Perfect number is not something in junior high school. This question is just to examine your grasp of the material question and try it out directly.