A:
Positive:
1 x 255000137 x 364285911 x 231818361 x 41803377 x 33116989 x 286517427 x 59719623 x 40931671 x 38003979 x 260473721 x 68534697 x 5429
Negative:
-1 x -25500013-7 x -3642859-11 x -2318183-61 x -418033-77 x -331169-89 x -286517-427 x -59719-623 x -40931-671 x -38003-979 x -26047-3721 x -6853-4697 x -5429
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 25,500,013, 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 | 25,500,013 | |
| -1 | -25,500,013 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,500,013.
Example:
1 x 25,500,013 = 25,500,013
and
-1 x -25,500,013 = 25,500,013
Notice both answers equal 25,500,013
With that explanation out of the way, let's continue. Next, we take the number 25,500,013 and divide it by 2:
25,500,013 ÷ 2 = 12,750,006.5
If the quotient is a whole number, then 2 and 12,750,006.5 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 | 25,500,013 | |
| -1 | -25,500,013 |
Now, we try dividing 25,500,013 by 3:
25,500,013 ÷ 3 = 8,500,004.3333
If the quotient is a whole number, then 3 and 8,500,004.3333 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 | 25,500,013 | |
| -1 | -25,500,013 |
Let's try dividing by 4:
25,500,013 ÷ 4 = 6,375,003.25
If the quotient is a whole number, then 4 and 6,375,003.25 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 | 25,500,013 | |
| -1 | 25,500,013 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 61 | 77 | 89 | 427 | 623 | 671 | 979 | 3,721 | 4,697 | 5,429 | 6,853 | 26,047 | 38,003 | 40,931 | 59,719 | 286,517 | 331,169 | 418,033 | 2,318,183 | 3,642,859 | 25,500,013 |
| -1 | -7 | -11 | -61 | -77 | -89 | -427 | -623 | -671 | -979 | -3,721 | -4,697 | -5,429 | -6,853 | -26,047 | -38,003 | -40,931 | -59,719 | -286,517 | -331,169 | -418,033 | -2,318,183 | -3,642,859 | -25,500,013 |
Here are some more numbers to try:
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