A:
Positive:
1 x 258728455 x 517456941 x 63104561 x 424145205 x 126209305 x 848292069 x 125052501 x 10345
Negative:
-1 x -25872845-5 x -5174569-41 x -631045-61 x -424145-205 x -126209-305 x -84829-2069 x -12505-2501 x -10345
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 25,872,845, 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 | 25,872,845 | |
| -1 | -25,872,845 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,872,845.
Example:
1 x 25,872,845 = 25,872,845
and
-1 x -25,872,845 = 25,872,845
Notice both answers equal 25,872,845
With that explanation out of the way, let's continue. Next, we take the number 25,872,845 and divide it by 2:
25,872,845 ÷ 2 = 12,936,422.5
If the quotient is a whole number, then 2 and 12,936,422.5 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 | 25,872,845 | |
| -1 | -25,872,845 |
Now, we try dividing 25,872,845 by 3:
25,872,845 ÷ 3 = 8,624,281.6667
If the quotient is a whole number, then 3 and 8,624,281.6667 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 | 25,872,845 | |
| -1 | -25,872,845 |
Let's try dividing by 4:
25,872,845 ÷ 4 = 6,468,211.25
If the quotient is a whole number, then 4 and 6,468,211.25 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 | 25,872,845 | |
| -1 | 25,872,845 |
If you did it right, you will end up with this table:
| 1 | 5 | 41 | 61 | 205 | 305 | 2,069 | 2,501 | 10,345 | 12,505 | 84,829 | 126,209 | 424,145 | 631,045 | 5,174,569 | 25,872,845 |
| -1 | -5 | -41 | -61 | -205 | -305 | -2,069 | -2,501 | -10,345 | -12,505 | -84,829 | -126,209 | -424,145 | -631,045 | -5,174,569 | -25,872,845 |
Here are some more numbers to try:
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