A:
Positive:
1 x 1316236397 x 1880337717 x 7742567119 x 1106081191 x 6891291337 x 984473247 x 405375791 x 22729
Negative:
-1 x -131623639-7 x -18803377-17 x -7742567-119 x -1106081-191 x -689129-1337 x -98447-3247 x -40537-5791 x -22729
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 131,623,639, 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 | 131,623,639 | |
| -1 | -131,623,639 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 131,623,639.
Example:
1 x 131,623,639 = 131,623,639
and
-1 x -131,623,639 = 131,623,639
Notice both answers equal 131,623,639
With that explanation out of the way, let's continue. Next, we take the number 131,623,639 and divide it by 2:
131,623,639 ÷ 2 = 65,811,819.5
If the quotient is a whole number, then 2 and 65,811,819.5 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 | 131,623,639 | |
| -1 | -131,623,639 |
Now, we try dividing 131,623,639 by 3:
131,623,639 ÷ 3 = 43,874,546.3333
If the quotient is a whole number, then 3 and 43,874,546.3333 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 | 131,623,639 | |
| -1 | -131,623,639 |
Let's try dividing by 4:
131,623,639 ÷ 4 = 32,905,909.75
If the quotient is a whole number, then 4 and 32,905,909.75 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 | 131,623,639 | |
| -1 | 131,623,639 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 119 | 191 | 1,337 | 3,247 | 5,791 | 22,729 | 40,537 | 98,447 | 689,129 | 1,106,081 | 7,742,567 | 18,803,377 | 131,623,639 |
| -1 | -7 | -17 | -119 | -191 | -1,337 | -3,247 | -5,791 | -22,729 | -40,537 | -98,447 | -689,129 | -1,106,081 | -7,742,567 | -18,803,377 | -131,623,639 |
Here are some more numbers to try:
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