A:
Positive:
1 x 3131551437 x 4473644923 x 13615441161 x 1945063463 x 6763613241 x 966234201 x 7454310649 x 29407
Negative:
-1 x -313155143-7 x -44736449-23 x -13615441-161 x -1945063-463 x -676361-3241 x -96623-4201 x -74543-10649 x -29407
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 313,155,143, 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 | 313,155,143 | |
| -1 | -313,155,143 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 313,155,143.
Example:
1 x 313,155,143 = 313,155,143
and
-1 x -313,155,143 = 313,155,143
Notice both answers equal 313,155,143
With that explanation out of the way, let's continue. Next, we take the number 313,155,143 and divide it by 2:
313,155,143 ÷ 2 = 156,577,571.5
If the quotient is a whole number, then 2 and 156,577,571.5 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 | 313,155,143 | |
| -1 | -313,155,143 |
Now, we try dividing 313,155,143 by 3:
313,155,143 ÷ 3 = 104,385,047.6667
If the quotient is a whole number, then 3 and 104,385,047.6667 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 | 313,155,143 | |
| -1 | -313,155,143 |
Let's try dividing by 4:
313,155,143 ÷ 4 = 78,288,785.75
If the quotient is a whole number, then 4 and 78,288,785.75 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 | 313,155,143 | |
| -1 | 313,155,143 |
If you did it right, you will end up with this table:
| 1 | 7 | 23 | 161 | 463 | 3,241 | 4,201 | 10,649 | 29,407 | 74,543 | 96,623 | 676,361 | 1,945,063 | 13,615,441 | 44,736,449 | 313,155,143 |
| -1 | -7 | -23 | -161 | -463 | -3,241 | -4,201 | -10,649 | -29,407 | -74,543 | -96,623 | -676,361 | -1,945,063 | -13,615,441 | -44,736,449 | -313,155,143 |
Here are some more numbers to try:
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