A:
Positive:
1 x 288888655 x 577777317 x 169934585 x 339869149 x 193885745 x 387772281 x 126652533 x 11405
Negative:
-1 x -28888865-5 x -5777773-17 x -1699345-85 x -339869-149 x -193885-745 x -38777-2281 x -12665-2533 x -11405
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 28,888,865, 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 | 28,888,865 | |
| -1 | -28,888,865 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,888,865.
Example:
1 x 28,888,865 = 28,888,865
and
-1 x -28,888,865 = 28,888,865
Notice both answers equal 28,888,865
With that explanation out of the way, let's continue. Next, we take the number 28,888,865 and divide it by 2:
28,888,865 ÷ 2 = 14,444,432.5
If the quotient is a whole number, then 2 and 14,444,432.5 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 | 28,888,865 | |
| -1 | -28,888,865 |
Now, we try dividing 28,888,865 by 3:
28,888,865 ÷ 3 = 9,629,621.6667
If the quotient is a whole number, then 3 and 9,629,621.6667 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 | 28,888,865 | |
| -1 | -28,888,865 |
Let's try dividing by 4:
28,888,865 ÷ 4 = 7,222,216.25
If the quotient is a whole number, then 4 and 7,222,216.25 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 | 28,888,865 | |
| -1 | 28,888,865 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 85 | 149 | 745 | 2,281 | 2,533 | 11,405 | 12,665 | 38,777 | 193,885 | 339,869 | 1,699,345 | 5,777,773 | 28,888,865 |
| -1 | -5 | -17 | -85 | -149 | -745 | -2,281 | -2,533 | -11,405 | -12,665 | -38,777 | -193,885 | -339,869 | -1,699,345 | -5,777,773 | -28,888,865 |
Here are some more numbers to try:
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