A:
Positive:
1 x 251638855 x 503277719 x 132441537 x 68010595 x 264883185 x 136021703 x 357953515 x 7159
Negative:
-1 x -25163885-5 x -5032777-19 x -1324415-37 x -680105-95 x -264883-185 x -136021-703 x -35795-3515 x -7159
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 25,163,885, 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 | 25,163,885 | |
| -1 | -25,163,885 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,163,885.
Example:
1 x 25,163,885 = 25,163,885
and
-1 x -25,163,885 = 25,163,885
Notice both answers equal 25,163,885
With that explanation out of the way, let's continue. Next, we take the number 25,163,885 and divide it by 2:
25,163,885 ÷ 2 = 12,581,942.5
If the quotient is a whole number, then 2 and 12,581,942.5 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 | 25,163,885 | |
| -1 | -25,163,885 |
Now, we try dividing 25,163,885 by 3:
25,163,885 ÷ 3 = 8,387,961.6667
If the quotient is a whole number, then 3 and 8,387,961.6667 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 | 25,163,885 | |
| -1 | -25,163,885 |
Let's try dividing by 4:
25,163,885 ÷ 4 = 6,290,971.25
If the quotient is a whole number, then 4 and 6,290,971.25 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 | 25,163,885 | |
| -1 | 25,163,885 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 37 | 95 | 185 | 703 | 3,515 | 7,159 | 35,795 | 136,021 | 264,883 | 680,105 | 1,324,415 | 5,032,777 | 25,163,885 |
| -1 | -5 | -19 | -37 | -95 | -185 | -703 | -3,515 | -7,159 | -35,795 | -136,021 | -264,883 | -680,105 | -1,324,415 | -5,032,777 | -25,163,885 |
Here are some more numbers to try:
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