A:
Positive:
1 x 13082072913 x 1006313317 x 7695337221 x 591949277 x 4722772137 x 612173601 x 363294709 x 27781
Negative:
-1 x -130820729-13 x -10063133-17 x -7695337-221 x -591949-277 x -472277-2137 x -61217-3601 x -36329-4709 x -27781
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 130,820,729, 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 | 130,820,729 | |
| -1 | -130,820,729 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 130,820,729.
Example:
1 x 130,820,729 = 130,820,729
and
-1 x -130,820,729 = 130,820,729
Notice both answers equal 130,820,729
With that explanation out of the way, let's continue. Next, we take the number 130,820,729 and divide it by 2:
130,820,729 ÷ 2 = 65,410,364.5
If the quotient is a whole number, then 2 and 65,410,364.5 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 | 130,820,729 | |
| -1 | -130,820,729 |
Now, we try dividing 130,820,729 by 3:
130,820,729 ÷ 3 = 43,606,909.6667
If the quotient is a whole number, then 3 and 43,606,909.6667 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 | 130,820,729 | |
| -1 | -130,820,729 |
Let's try dividing by 4:
130,820,729 ÷ 4 = 32,705,182.25
If the quotient is a whole number, then 4 and 32,705,182.25 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 | 130,820,729 | |
| -1 | 130,820,729 |
If you did it right, you will end up with this table:
| 1 | 13 | 17 | 221 | 277 | 2,137 | 3,601 | 4,709 | 27,781 | 36,329 | 61,217 | 472,277 | 591,949 | 7,695,337 | 10,063,133 | 130,820,729 |
| -1 | -13 | -17 | -221 | -277 | -2,137 | -3,601 | -4,709 | -27,781 | -36,329 | -61,217 | -472,277 | -591,949 | -7,695,337 | -10,063,133 | -130,820,729 |
Here are some more numbers to try:
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