A:
Positive:
1 x 1313563911 x 119414971 x 185009121 x 108559139 x 94501781 x 168191331 x 98691529 x 8591
Negative:
-1 x -13135639-11 x -1194149-71 x -185009-121 x -108559-139 x -94501-781 x -16819-1331 x -9869-1529 x -8591
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 13,135,639, 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 | 13,135,639 | |
| -1 | -13,135,639 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,135,639.
Example:
1 x 13,135,639 = 13,135,639
and
-1 x -13,135,639 = 13,135,639
Notice both answers equal 13,135,639
With that explanation out of the way, let's continue. Next, we take the number 13,135,639 and divide it by 2:
13,135,639 ÷ 2 = 6,567,819.5
If the quotient is a whole number, then 2 and 6,567,819.5 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 | 13,135,639 | |
| -1 | -13,135,639 |
Now, we try dividing 13,135,639 by 3:
13,135,639 ÷ 3 = 4,378,546.3333
If the quotient is a whole number, then 3 and 4,378,546.3333 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 | 13,135,639 | |
| -1 | -13,135,639 |
Let's try dividing by 4:
13,135,639 ÷ 4 = 3,283,909.75
If the quotient is a whole number, then 4 and 3,283,909.75 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 | 13,135,639 | |
| -1 | 13,135,639 |
If you did it right, you will end up with this table:
| 1 | 11 | 71 | 121 | 139 | 781 | 1,331 | 1,529 | 8,591 | 9,869 | 16,819 | 94,501 | 108,559 | 185,009 | 1,194,149 | 13,135,639 |
| -1 | -11 | -71 | -121 | -139 | -781 | -1,331 | -1,529 | -8,591 | -9,869 | -16,819 | -94,501 | -108,559 | -185,009 | -1,194,149 | -13,135,639 |
Here are some more numbers to try:
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