A:
Positive:
1 x 1292794555 x 2585589131 x 417030553 x 2439235155 x 834061265 x 4878471643 x 786858215 x 15737
Negative:
-1 x -129279455-5 x -25855891-31 x -4170305-53 x -2439235-155 x -834061-265 x -487847-1643 x -78685-8215 x -15737
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 129,279,455, 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 | 129,279,455 | |
| -1 | -129,279,455 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 129,279,455.
Example:
1 x 129,279,455 = 129,279,455
and
-1 x -129,279,455 = 129,279,455
Notice both answers equal 129,279,455
With that explanation out of the way, let's continue. Next, we take the number 129,279,455 and divide it by 2:
129,279,455 ÷ 2 = 64,639,727.5
If the quotient is a whole number, then 2 and 64,639,727.5 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 | 129,279,455 | |
| -1 | -129,279,455 |
Now, we try dividing 129,279,455 by 3:
129,279,455 ÷ 3 = 43,093,151.6667
If the quotient is a whole number, then 3 and 43,093,151.6667 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 | 129,279,455 | |
| -1 | -129,279,455 |
Let's try dividing by 4:
129,279,455 ÷ 4 = 32,319,863.75
If the quotient is a whole number, then 4 and 32,319,863.75 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 | 129,279,455 | |
| -1 | 129,279,455 |
If you did it right, you will end up with this table:
| 1 | 5 | 31 | 53 | 155 | 265 | 1,643 | 8,215 | 15,737 | 78,685 | 487,847 | 834,061 | 2,439,235 | 4,170,305 | 25,855,891 | 129,279,455 |
| -1 | -5 | -31 | -53 | -155 | -265 | -1,643 | -8,215 | -15,737 | -78,685 | -487,847 | -834,061 | -2,439,235 | -4,170,305 | -25,855,891 | -129,279,455 |
Here are some more numbers to try:
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