A:
Positive:
1 x 211767717 x 302525311 x 192516149 x 43217977 x 275023101 x 209671389 x 54439539 x 39289707 x 299531111 x 190612723 x 77774279 x 4949
Negative:
-1 x -21176771-7 x -3025253-11 x -1925161-49 x -432179-77 x -275023-101 x -209671-389 x -54439-539 x -39289-707 x -29953-1111 x -19061-2723 x -7777-4279 x -4949
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 21,176,771, 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 | 21,176,771 | |
| -1 | -21,176,771 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,176,771.
Example:
1 x 21,176,771 = 21,176,771
and
-1 x -21,176,771 = 21,176,771
Notice both answers equal 21,176,771
With that explanation out of the way, let's continue. Next, we take the number 21,176,771 and divide it by 2:
21,176,771 ÷ 2 = 10,588,385.5
If the quotient is a whole number, then 2 and 10,588,385.5 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 | 21,176,771 | |
| -1 | -21,176,771 |
Now, we try dividing 21,176,771 by 3:
21,176,771 ÷ 3 = 7,058,923.6667
If the quotient is a whole number, then 3 and 7,058,923.6667 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 | 21,176,771 | |
| -1 | -21,176,771 |
Let's try dividing by 4:
21,176,771 ÷ 4 = 5,294,192.75
If the quotient is a whole number, then 4 and 5,294,192.75 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 | 21,176,771 | |
| -1 | 21,176,771 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 49 | 77 | 101 | 389 | 539 | 707 | 1,111 | 2,723 | 4,279 | 4,949 | 7,777 | 19,061 | 29,953 | 39,289 | 54,439 | 209,671 | 275,023 | 432,179 | 1,925,161 | 3,025,253 | 21,176,771 |
| -1 | -7 | -11 | -49 | -77 | -101 | -389 | -539 | -707 | -1,111 | -2,723 | -4,279 | -4,949 | -7,777 | -19,061 | -29,953 | -39,289 | -54,439 | -209,671 | -275,023 | -432,179 | -1,925,161 | -3,025,253 | -21,176,771 |
Here are some more numbers to try:
Try the factor calculator