A:
Positive:
1 x 1288884255 x 2577768525 x 515553761 x 2112925223 x 577975305 x 422585379 x 3400751115 x 1155951525 x 845171895 x 680155575 x 231199475 x 13603
Negative:
-1 x -128888425-5 x -25777685-25 x -5155537-61 x -2112925-223 x -577975-305 x -422585-379 x -340075-1115 x -115595-1525 x -84517-1895 x -68015-5575 x -23119-9475 x -13603
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 128,888,425, 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 | 128,888,425 | |
| -1 | -128,888,425 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 128,888,425.
Example:
1 x 128,888,425 = 128,888,425
and
-1 x -128,888,425 = 128,888,425
Notice both answers equal 128,888,425
With that explanation out of the way, let's continue. Next, we take the number 128,888,425 and divide it by 2:
128,888,425 ÷ 2 = 64,444,212.5
If the quotient is a whole number, then 2 and 64,444,212.5 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 | 128,888,425 | |
| -1 | -128,888,425 |
Now, we try dividing 128,888,425 by 3:
128,888,425 ÷ 3 = 42,962,808.3333
If the quotient is a whole number, then 3 and 42,962,808.3333 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 | 128,888,425 | |
| -1 | -128,888,425 |
Let's try dividing by 4:
128,888,425 ÷ 4 = 32,222,106.25
If the quotient is a whole number, then 4 and 32,222,106.25 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 | 128,888,425 | |
| -1 | 128,888,425 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 61 | 223 | 305 | 379 | 1,115 | 1,525 | 1,895 | 5,575 | 9,475 | 13,603 | 23,119 | 68,015 | 84,517 | 115,595 | 340,075 | 422,585 | 577,975 | 2,112,925 | 5,155,537 | 25,777,685 | 128,888,425 |
| -1 | -5 | -25 | -61 | -223 | -305 | -379 | -1,115 | -1,525 | -1,895 | -5,575 | -9,475 | -13,603 | -23,119 | -68,015 | -84,517 | -115,595 | -340,075 | -422,585 | -577,975 | -2,112,925 | -5,155,537 | -25,777,685 | -128,888,425 |
Here are some more numbers to try:
Try the factor calculator