A:
Positive:
1 x 4005504055 x 8011008123 x 1741523571 x 5641555115 x 3483047355 x 11283111633 x 2452858165 x 49057
Negative:
-1 x -400550405-5 x -80110081-23 x -17415235-71 x -5641555-115 x -3483047-355 x -1128311-1633 x -245285-8165 x -49057
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 400,550,405, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 400,550,405 | |
| -1 | -400,550,405 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 400,550,405.
Example:
1 x 400,550,405 = 400,550,405
and
-1 x -400,550,405 = 400,550,405
Notice both answers equal 400,550,405
With that explanation out of the way, let's continue. Next, we take the number 400,550,405 and divide it by 2:
400,550,405 ÷ 2 = 200,275,202.5
If the quotient is a whole number, then 2 and 200,275,202.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 400,550,405 | |
| -1 | -400,550,405 |
Now, we try dividing 400,550,405 by 3:
400,550,405 ÷ 3 = 133,516,801.6667
If the quotient is a whole number, then 3 and 133,516,801.6667 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 400,550,405 | |
| -1 | -400,550,405 |
Let's try dividing by 4:
400,550,405 ÷ 4 = 100,137,601.25
If the quotient is a whole number, then 4 and 100,137,601.25 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 400,550,405 | |
| -1 | 400,550,405 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 71 | 115 | 355 | 1,633 | 8,165 | 49,057 | 245,285 | 1,128,311 | 3,483,047 | 5,641,555 | 17,415,235 | 80,110,081 | 400,550,405 |
| -1 | -5 | -23 | -71 | -115 | -355 | -1,633 | -8,165 | -49,057 | -245,285 | -1,128,311 | -3,483,047 | -5,641,555 | -17,415,235 | -80,110,081 | -400,550,405 |
Here are some more numbers to try:
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