A:
Positive:
1 x 258151677 x 368788119 x 135869367 x 385301133 x 194099469 x 550431273 x 202792897 x 8911
Negative:
-1 x -25815167-7 x -3687881-19 x -1358693-67 x -385301-133 x -194099-469 x -55043-1273 x -20279-2897 x -8911
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 25,815,167, 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 | 25,815,167 | |
| -1 | -25,815,167 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,815,167.
Example:
1 x 25,815,167 = 25,815,167
and
-1 x -25,815,167 = 25,815,167
Notice both answers equal 25,815,167
With that explanation out of the way, let's continue. Next, we take the number 25,815,167 and divide it by 2:
25,815,167 ÷ 2 = 12,907,583.5
If the quotient is a whole number, then 2 and 12,907,583.5 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 | 25,815,167 | |
| -1 | -25,815,167 |
Now, we try dividing 25,815,167 by 3:
25,815,167 ÷ 3 = 8,605,055.6667
If the quotient is a whole number, then 3 and 8,605,055.6667 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 | 25,815,167 | |
| -1 | -25,815,167 |
Let's try dividing by 4:
25,815,167 ÷ 4 = 6,453,791.75
If the quotient is a whole number, then 4 and 6,453,791.75 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 | 25,815,167 | |
| -1 | 25,815,167 |
If you did it right, you will end up with this table:
| 1 | 7 | 19 | 67 | 133 | 469 | 1,273 | 2,897 | 8,911 | 20,279 | 55,043 | 194,099 | 385,301 | 1,358,693 | 3,687,881 | 25,815,167 |
| -1 | -7 | -19 | -67 | -133 | -469 | -1,273 | -2,897 | -8,911 | -20,279 | -55,043 | -194,099 | -385,301 | -1,358,693 | -3,687,881 | -25,815,167 |
Here are some more numbers to try:
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