A:
Positive:
1 x 2503029111 x 227548113 x 1925407113 x 221507143 x 1750371243 x 201371469 x 170391549 x 16159
Negative:
-1 x -25030291-11 x -2275481-13 x -1925407-113 x -221507-143 x -175037-1243 x -20137-1469 x -17039-1549 x -16159
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 25,030,291, 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 | 25,030,291 | |
| -1 | -25,030,291 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,030,291.
Example:
1 x 25,030,291 = 25,030,291
and
-1 x -25,030,291 = 25,030,291
Notice both answers equal 25,030,291
With that explanation out of the way, let's continue. Next, we take the number 25,030,291 and divide it by 2:
25,030,291 ÷ 2 = 12,515,145.5
If the quotient is a whole number, then 2 and 12,515,145.5 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 | 25,030,291 | |
| -1 | -25,030,291 |
Now, we try dividing 25,030,291 by 3:
25,030,291 ÷ 3 = 8,343,430.3333
If the quotient is a whole number, then 3 and 8,343,430.3333 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 | 25,030,291 | |
| -1 | -25,030,291 |
Let's try dividing by 4:
25,030,291 ÷ 4 = 6,257,572.75
If the quotient is a whole number, then 4 and 6,257,572.75 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 | 25,030,291 | |
| -1 | 25,030,291 |
If you did it right, you will end up with this table:
| 1 | 11 | 13 | 113 | 143 | 1,243 | 1,469 | 1,549 | 16,159 | 17,039 | 20,137 | 175,037 | 221,507 | 1,925,407 | 2,275,481 | 25,030,291 |
| -1 | -11 | -13 | -113 | -143 | -1,243 | -1,469 | -1,549 | -16,159 | -17,039 | -20,137 | -175,037 | -221,507 | -1,925,407 | -2,275,481 | -25,030,291 |
Here are some more numbers to try:
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