A:
Positive:
1 x 217975455 x 43595097 x 311393511 x 198159535 x 62278755 x 39631977 x 283085121 x 180145385 x 56617605 x 36029847 x 257354235 x 5147
Negative:
-1 x -21797545-5 x -4359509-7 x -3113935-11 x -1981595-35 x -622787-55 x -396319-77 x -283085-121 x -180145-385 x -56617-605 x -36029-847 x -25735-4235 x -5147
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 21,797,545, 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 | 21,797,545 | |
| -1 | -21,797,545 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,797,545.
Example:
1 x 21,797,545 = 21,797,545
and
-1 x -21,797,545 = 21,797,545
Notice both answers equal 21,797,545
With that explanation out of the way, let's continue. Next, we take the number 21,797,545 and divide it by 2:
21,797,545 ÷ 2 = 10,898,772.5
If the quotient is a whole number, then 2 and 10,898,772.5 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 | 21,797,545 | |
| -1 | -21,797,545 |
Now, we try dividing 21,797,545 by 3:
21,797,545 ÷ 3 = 7,265,848.3333
If the quotient is a whole number, then 3 and 7,265,848.3333 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 | 21,797,545 | |
| -1 | -21,797,545 |
Let's try dividing by 4:
21,797,545 ÷ 4 = 5,449,386.25
If the quotient is a whole number, then 4 and 5,449,386.25 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 | 21,797,545 | |
| -1 | 21,797,545 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 11 | 35 | 55 | 77 | 121 | 385 | 605 | 847 | 4,235 | 5,147 | 25,735 | 36,029 | 56,617 | 180,145 | 283,085 | 396,319 | 622,787 | 1,981,595 | 3,113,935 | 4,359,509 | 21,797,545 |
| -1 | -5 | -7 | -11 | -35 | -55 | -77 | -121 | -385 | -605 | -847 | -4,235 | -5,147 | -25,735 | -36,029 | -56,617 | -180,145 | -283,085 | -396,319 | -622,787 | -1,981,595 | -3,113,935 | -4,359,509 | -21,797,545 |
Here are some more numbers to try:
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