A:
Positive:
1 x 2518527137 x 68068359 x 42686983 x 303437139 x 1811892183 x 115373071 x 82014897 x 5143
Negative:
-1 x -25185271-37 x -680683-59 x -426869-83 x -303437-139 x -181189-2183 x -11537-3071 x -8201-4897 x -5143
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 25,185,271, 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 | 25,185,271 | |
| -1 | -25,185,271 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,185,271.
Example:
1 x 25,185,271 = 25,185,271
and
-1 x -25,185,271 = 25,185,271
Notice both answers equal 25,185,271
With that explanation out of the way, let's continue. Next, we take the number 25,185,271 and divide it by 2:
25,185,271 ÷ 2 = 12,592,635.5
If the quotient is a whole number, then 2 and 12,592,635.5 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 | 25,185,271 | |
| -1 | -25,185,271 |
Now, we try dividing 25,185,271 by 3:
25,185,271 ÷ 3 = 8,395,090.3333
If the quotient is a whole number, then 3 and 8,395,090.3333 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 | 25,185,271 | |
| -1 | -25,185,271 |
Let's try dividing by 4:
25,185,271 ÷ 4 = 6,296,317.75
If the quotient is a whole number, then 4 and 6,296,317.75 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 | 25,185,271 | |
| -1 | 25,185,271 |
If you did it right, you will end up with this table:
| 1 | 37 | 59 | 83 | 139 | 2,183 | 3,071 | 4,897 | 5,143 | 8,201 | 11,537 | 181,189 | 303,437 | 426,869 | 680,683 | 25,185,271 |
| -1 | -37 | -59 | -83 | -139 | -2,183 | -3,071 | -4,897 | -5,143 | -8,201 | -11,537 | -181,189 | -303,437 | -426,869 | -680,683 | -25,185,271 |
Here are some more numbers to try:
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