A:
Positive:
1 x 254221317 x 363173349 x 518819137 x 185563343 x 74117541 x 46991959 x 265093787 x 6713
Negative:
-1 x -25422131-7 x -3631733-49 x -518819-137 x -185563-343 x -74117-541 x -46991-959 x -26509-3787 x -6713
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 25,422,131, 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 | 25,422,131 | |
| -1 | -25,422,131 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,422,131.
Example:
1 x 25,422,131 = 25,422,131
and
-1 x -25,422,131 = 25,422,131
Notice both answers equal 25,422,131
With that explanation out of the way, let's continue. Next, we take the number 25,422,131 and divide it by 2:
25,422,131 ÷ 2 = 12,711,065.5
If the quotient is a whole number, then 2 and 12,711,065.5 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 | 25,422,131 | |
| -1 | -25,422,131 |
Now, we try dividing 25,422,131 by 3:
25,422,131 ÷ 3 = 8,474,043.6667
If the quotient is a whole number, then 3 and 8,474,043.6667 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 | 25,422,131 | |
| -1 | -25,422,131 |
Let's try dividing by 4:
25,422,131 ÷ 4 = 6,355,532.75
If the quotient is a whole number, then 4 and 6,355,532.75 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 | 25,422,131 | |
| -1 | 25,422,131 |
If you did it right, you will end up with this table:
| 1 | 7 | 49 | 137 | 343 | 541 | 959 | 3,787 | 6,713 | 26,509 | 46,991 | 74,117 | 185,563 | 518,819 | 3,631,733 | 25,422,131 |
| -1 | -7 | -49 | -137 | -343 | -541 | -959 | -3,787 | -6,713 | -26,509 | -46,991 | -74,117 | -185,563 | -518,819 | -3,631,733 | -25,422,131 |
Here are some more numbers to try:
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