A:
Positive:
1 x 1301213455 x 2602426971 x 1832695355 x 366539359 x 3624551021 x 1274451795 x 724915105 x 25489
Negative:
-1 x -130121345-5 x -26024269-71 x -1832695-355 x -366539-359 x -362455-1021 x -127445-1795 x -72491-5105 x -25489
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 130,121,345, 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 | 130,121,345 | |
| -1 | -130,121,345 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 130,121,345.
Example:
1 x 130,121,345 = 130,121,345
and
-1 x -130,121,345 = 130,121,345
Notice both answers equal 130,121,345
With that explanation out of the way, let's continue. Next, we take the number 130,121,345 and divide it by 2:
130,121,345 ÷ 2 = 65,060,672.5
If the quotient is a whole number, then 2 and 65,060,672.5 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 | 130,121,345 | |
| -1 | -130,121,345 |
Now, we try dividing 130,121,345 by 3:
130,121,345 ÷ 3 = 43,373,781.6667
If the quotient is a whole number, then 3 and 43,373,781.6667 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 | 130,121,345 | |
| -1 | -130,121,345 |
Let's try dividing by 4:
130,121,345 ÷ 4 = 32,530,336.25
If the quotient is a whole number, then 4 and 32,530,336.25 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 | 130,121,345 | |
| -1 | 130,121,345 |
If you did it right, you will end up with this table:
| 1 | 5 | 71 | 355 | 359 | 1,021 | 1,795 | 5,105 | 25,489 | 72,491 | 127,445 | 362,455 | 366,539 | 1,832,695 | 26,024,269 | 130,121,345 |
| -1 | -5 | -71 | -355 | -359 | -1,021 | -1,795 | -5,105 | -25,489 | -72,491 | -127,445 | -362,455 | -366,539 | -1,832,695 | -26,024,269 | -130,121,345 |
Here are some more numbers to try:
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