A:
Positive:
1 x 256244155 x 512488323 x 1114105115 x 222821163 x 157205815 x 314411367 x 187453749 x 6835
Negative:
-1 x -25624415-5 x -5124883-23 x -1114105-115 x -222821-163 x -157205-815 x -31441-1367 x -18745-3749 x -6835
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 25,624,415, 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 | 25,624,415 | |
| -1 | -25,624,415 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,624,415.
Example:
1 x 25,624,415 = 25,624,415
and
-1 x -25,624,415 = 25,624,415
Notice both answers equal 25,624,415
With that explanation out of the way, let's continue. Next, we take the number 25,624,415 and divide it by 2:
25,624,415 ÷ 2 = 12,812,207.5
If the quotient is a whole number, then 2 and 12,812,207.5 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 | 25,624,415 | |
| -1 | -25,624,415 |
Now, we try dividing 25,624,415 by 3:
25,624,415 ÷ 3 = 8,541,471.6667
If the quotient is a whole number, then 3 and 8,541,471.6667 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 | 25,624,415 | |
| -1 | -25,624,415 |
Let's try dividing by 4:
25,624,415 ÷ 4 = 6,406,103.75
If the quotient is a whole number, then 4 and 6,406,103.75 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 | 25,624,415 | |
| -1 | 25,624,415 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 115 | 163 | 815 | 1,367 | 3,749 | 6,835 | 18,745 | 31,441 | 157,205 | 222,821 | 1,114,105 | 5,124,883 | 25,624,415 |
| -1 | -5 | -23 | -115 | -163 | -815 | -1,367 | -3,749 | -6,835 | -18,745 | -31,441 | -157,205 | -222,821 | -1,114,105 | -5,124,883 | -25,624,415 |
Here are some more numbers to try:
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