A:
Positive:
1 x 251595197 x 359421711 x 228722937 x 67998777 x 326747259 x 97141407 x 618172849 x 8831
Negative:
-1 x -25159519-7 x -3594217-11 x -2287229-37 x -679987-77 x -326747-259 x -97141-407 x -61817-2849 x -8831
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 25,159,519, 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 | 25,159,519 | |
| -1 | -25,159,519 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,159,519.
Example:
1 x 25,159,519 = 25,159,519
and
-1 x -25,159,519 = 25,159,519
Notice both answers equal 25,159,519
With that explanation out of the way, let's continue. Next, we take the number 25,159,519 and divide it by 2:
25,159,519 ÷ 2 = 12,579,759.5
If the quotient is a whole number, then 2 and 12,579,759.5 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 | 25,159,519 | |
| -1 | -25,159,519 |
Now, we try dividing 25,159,519 by 3:
25,159,519 ÷ 3 = 8,386,506.3333
If the quotient is a whole number, then 3 and 8,386,506.3333 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 | 25,159,519 | |
| -1 | -25,159,519 |
Let's try dividing by 4:
25,159,519 ÷ 4 = 6,289,879.75
If the quotient is a whole number, then 4 and 6,289,879.75 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 | 25,159,519 | |
| -1 | 25,159,519 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 37 | 77 | 259 | 407 | 2,849 | 8,831 | 61,817 | 97,141 | 326,747 | 679,987 | 2,287,229 | 3,594,217 | 25,159,519 |
| -1 | -7 | -11 | -37 | -77 | -259 | -407 | -2,849 | -8,831 | -61,817 | -97,141 | -326,747 | -679,987 | -2,287,229 | -3,594,217 | -25,159,519 |
Here are some more numbers to try:
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