A:
Positive:
1 x 2687499111 x 244318113 x 206730771 x 378521143 x 187937781 x 34411923 x 291172647 x 10153
Negative:
-1 x -26874991-11 x -2443181-13 x -2067307-71 x -378521-143 x -187937-781 x -34411-923 x -29117-2647 x -10153
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 26,874,991, 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 | 26,874,991 | |
| -1 | -26,874,991 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 26,874,991.
Example:
1 x 26,874,991 = 26,874,991
and
-1 x -26,874,991 = 26,874,991
Notice both answers equal 26,874,991
With that explanation out of the way, let's continue. Next, we take the number 26,874,991 and divide it by 2:
26,874,991 ÷ 2 = 13,437,495.5
If the quotient is a whole number, then 2 and 13,437,495.5 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 | 26,874,991 | |
| -1 | -26,874,991 |
Now, we try dividing 26,874,991 by 3:
26,874,991 ÷ 3 = 8,958,330.3333
If the quotient is a whole number, then 3 and 8,958,330.3333 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 | 26,874,991 | |
| -1 | -26,874,991 |
Let's try dividing by 4:
26,874,991 ÷ 4 = 6,718,747.75
If the quotient is a whole number, then 4 and 6,718,747.75 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 | 26,874,991 | |
| -1 | 26,874,991 |
If you did it right, you will end up with this table:
| 1 | 11 | 13 | 71 | 143 | 781 | 923 | 2,647 | 10,153 | 29,117 | 34,411 | 187,937 | 378,521 | 2,067,307 | 2,443,181 | 26,874,991 |
| -1 | -11 | -13 | -71 | -143 | -781 | -923 | -2,647 | -10,153 | -29,117 | -34,411 | -187,937 | -378,521 | -2,067,307 | -2,443,181 | -26,874,991 |
Here are some more numbers to try:
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