A:
Positive:
1 x 13121242319 x 690591741 x 3200303389 x 337307433 x 303031779 x 1684377391 x 177538227 x 15949
Negative:
-1 x -131212423-19 x -6905917-41 x -3200303-389 x -337307-433 x -303031-779 x -168437-7391 x -17753-8227 x -15949
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 131,212,423, 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 | 131,212,423 | |
| -1 | -131,212,423 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 131,212,423.
Example:
1 x 131,212,423 = 131,212,423
and
-1 x -131,212,423 = 131,212,423
Notice both answers equal 131,212,423
With that explanation out of the way, let's continue. Next, we take the number 131,212,423 and divide it by 2:
131,212,423 ÷ 2 = 65,606,211.5
If the quotient is a whole number, then 2 and 65,606,211.5 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 | 131,212,423 | |
| -1 | -131,212,423 |
Now, we try dividing 131,212,423 by 3:
131,212,423 ÷ 3 = 43,737,474.3333
If the quotient is a whole number, then 3 and 43,737,474.3333 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 | 131,212,423 | |
| -1 | -131,212,423 |
Let's try dividing by 4:
131,212,423 ÷ 4 = 32,803,105.75
If the quotient is a whole number, then 4 and 32,803,105.75 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 | 131,212,423 | |
| -1 | 131,212,423 |
If you did it right, you will end up with this table:
| 1 | 19 | 41 | 389 | 433 | 779 | 7,391 | 8,227 | 15,949 | 17,753 | 168,437 | 303,031 | 337,307 | 3,200,303 | 6,905,917 | 131,212,423 |
| -1 | -19 | -41 | -389 | -433 | -779 | -7,391 | -8,227 | -15,949 | -17,753 | -168,437 | -303,031 | -337,307 | -3,200,303 | -6,905,917 | -131,212,423 |
Here are some more numbers to try:
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