A:
Positive:
1 x 2664064711 x 242187723 x 115828929 x 918643253 x 105299319 x 83513667 x 399413631 x 7337
Negative:
-1 x -26640647-11 x -2421877-23 x -1158289-29 x -918643-253 x -105299-319 x -83513-667 x -39941-3631 x -7337
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 26,640,647, 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 | 26,640,647 | |
| -1 | -26,640,647 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 26,640,647.
Example:
1 x 26,640,647 = 26,640,647
and
-1 x -26,640,647 = 26,640,647
Notice both answers equal 26,640,647
With that explanation out of the way, let's continue. Next, we take the number 26,640,647 and divide it by 2:
26,640,647 ÷ 2 = 13,320,323.5
If the quotient is a whole number, then 2 and 13,320,323.5 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 | 26,640,647 | |
| -1 | -26,640,647 |
Now, we try dividing 26,640,647 by 3:
26,640,647 ÷ 3 = 8,880,215.6667
If the quotient is a whole number, then 3 and 8,880,215.6667 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 | 26,640,647 | |
| -1 | -26,640,647 |
Let's try dividing by 4:
26,640,647 ÷ 4 = 6,660,161.75
If the quotient is a whole number, then 4 and 6,660,161.75 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 | 26,640,647 | |
| -1 | 26,640,647 |
If you did it right, you will end up with this table:
| 1 | 11 | 23 | 29 | 253 | 319 | 667 | 3,631 | 7,337 | 39,941 | 83,513 | 105,299 | 918,643 | 1,158,289 | 2,421,877 | 26,640,647 |
| -1 | -11 | -23 | -29 | -253 | -319 | -667 | -3,631 | -7,337 | -39,941 | -83,513 | -105,299 | -918,643 | -1,158,289 | -2,421,877 | -26,640,647 |
Here are some more numbers to try:
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