A:
Positive:
1 x 4000855 x 800177 x 5715523 x 1739535 x 1143149 x 816571 x 5635115 x 3479161 x 2485245 x 1633355 x 1127497 x 805
Negative:
-1 x -400085-5 x -80017-7 x -57155-23 x -17395-35 x -11431-49 x -8165-71 x -5635-115 x -3479-161 x -2485-245 x -1633-355 x -1127-497 x -805
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 400,085, 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 | 400,085 | |
| -1 | -400,085 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 400,085.
Example:
1 x 400,085 = 400,085
and
-1 x -400,085 = 400,085
Notice both answers equal 400,085
With that explanation out of the way, let's continue. Next, we take the number 400,085 and divide it by 2:
400,085 ÷ 2 = 200,042.5
If the quotient is a whole number, then 2 and 200,042.5 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 | 400,085 | |
| -1 | -400,085 |
Now, we try dividing 400,085 by 3:
400,085 ÷ 3 = 133,361.6667
If the quotient is a whole number, then 3 and 133,361.6667 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 | 400,085 | |
| -1 | -400,085 |
Let's try dividing by 4:
400,085 ÷ 4 = 100,021.25
If the quotient is a whole number, then 4 and 100,021.25 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 | 400,085 | |
| -1 | 400,085 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 23 | 35 | 49 | 71 | 115 | 161 | 245 | 355 | 497 | 805 | 1,127 | 1,633 | 2,485 | 3,479 | 5,635 | 8,165 | 11,431 | 17,395 | 57,155 | 80,017 | 400,085 |
| -1 | -5 | -7 | -23 | -35 | -49 | -71 | -115 | -161 | -245 | -355 | -497 | -805 | -1,127 | -1,633 | -2,485 | -3,479 | -5,635 | -8,165 | -11,431 | -17,395 | -57,155 | -80,017 | -400,085 |
Here are some more numbers to try:
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