A:
Positive:
1 x 250878655 x 501757311 x 228071555 x 456143349 x 718851307 x 191951745 x 143773839 x 6535
Negative:
-1 x -25087865-5 x -5017573-11 x -2280715-55 x -456143-349 x -71885-1307 x -19195-1745 x -14377-3839 x -6535
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 25,087,865, 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 | 25,087,865 | |
| -1 | -25,087,865 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,087,865.
Example:
1 x 25,087,865 = 25,087,865
and
-1 x -25,087,865 = 25,087,865
Notice both answers equal 25,087,865
With that explanation out of the way, let's continue. Next, we take the number 25,087,865 and divide it by 2:
25,087,865 ÷ 2 = 12,543,932.5
If the quotient is a whole number, then 2 and 12,543,932.5 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 | 25,087,865 | |
| -1 | -25,087,865 |
Now, we try dividing 25,087,865 by 3:
25,087,865 ÷ 3 = 8,362,621.6667
If the quotient is a whole number, then 3 and 8,362,621.6667 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 | 25,087,865 | |
| -1 | -25,087,865 |
Let's try dividing by 4:
25,087,865 ÷ 4 = 6,271,966.25
If the quotient is a whole number, then 4 and 6,271,966.25 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 | 25,087,865 | |
| -1 | 25,087,865 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 349 | 1,307 | 1,745 | 3,839 | 6,535 | 14,377 | 19,195 | 71,885 | 456,143 | 2,280,715 | 5,017,573 | 25,087,865 |
| -1 | -5 | -11 | -55 | -349 | -1,307 | -1,745 | -3,839 | -6,535 | -14,377 | -19,195 | -71,885 | -456,143 | -2,280,715 | -5,017,573 | -25,087,865 |
Here are some more numbers to try:
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