A:
Positive:
1 x 255183117 x 364547313 x 196294719 x 134306991 x 280421133 x 191867247 x 1033131729 x 14759
Negative:
-1 x -25518311-7 x -3645473-13 x -1962947-19 x -1343069-91 x -280421-133 x -191867-247 x -103313-1729 x -14759
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 25,518,311, 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 | 25,518,311 | |
| -1 | -25,518,311 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,518,311.
Example:
1 x 25,518,311 = 25,518,311
and
-1 x -25,518,311 = 25,518,311
Notice both answers equal 25,518,311
With that explanation out of the way, let's continue. Next, we take the number 25,518,311 and divide it by 2:
25,518,311 ÷ 2 = 12,759,155.5
If the quotient is a whole number, then 2 and 12,759,155.5 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 | 25,518,311 | |
| -1 | -25,518,311 |
Now, we try dividing 25,518,311 by 3:
25,518,311 ÷ 3 = 8,506,103.6667
If the quotient is a whole number, then 3 and 8,506,103.6667 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 | 25,518,311 | |
| -1 | -25,518,311 |
Let's try dividing by 4:
25,518,311 ÷ 4 = 6,379,577.75
If the quotient is a whole number, then 4 and 6,379,577.75 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 | 25,518,311 | |
| -1 | 25,518,311 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 19 | 91 | 133 | 247 | 1,729 | 14,759 | 103,313 | 191,867 | 280,421 | 1,343,069 | 1,962,947 | 3,645,473 | 25,518,311 |
| -1 | -7 | -13 | -19 | -91 | -133 | -247 | -1,729 | -14,759 | -103,313 | -191,867 | -280,421 | -1,343,069 | -1,962,947 | -3,645,473 | -25,518,311 |
Here are some more numbers to try:
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