A:
Positive:
1 x 21956355 x 43912713 x 16889517 x 12915565 x 3377985 x 25831221 x 99351105 x 1987
Negative:
-1 x -2195635-5 x -439127-13 x -168895-17 x -129155-65 x -33779-85 x -25831-221 x -9935-1105 x -1987
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 2,195,635, 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 | 2,195,635 | |
| -1 | -2,195,635 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 2,195,635.
Example:
1 x 2,195,635 = 2,195,635
and
-1 x -2,195,635 = 2,195,635
Notice both answers equal 2,195,635
With that explanation out of the way, let's continue. Next, we take the number 2,195,635 and divide it by 2:
2,195,635 ÷ 2 = 1,097,817.5
If the quotient is a whole number, then 2 and 1,097,817.5 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 | 2,195,635 | |
| -1 | -2,195,635 |
Now, we try dividing 2,195,635 by 3:
2,195,635 ÷ 3 = 731,878.3333
If the quotient is a whole number, then 3 and 731,878.3333 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 | 2,195,635 | |
| -1 | -2,195,635 |
Let's try dividing by 4:
2,195,635 ÷ 4 = 548,908.75
If the quotient is a whole number, then 4 and 548,908.75 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 | 2,195,635 | |
| -1 | 2,195,635 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 17 | 65 | 85 | 221 | 1,105 | 1,987 | 9,935 | 25,831 | 33,779 | 129,155 | 168,895 | 439,127 | 2,195,635 |
| -1 | -5 | -13 | -17 | -65 | -85 | -221 | -1,105 | -1,987 | -9,935 | -25,831 | -33,779 | -129,155 | -168,895 | -439,127 | -2,195,635 |
Here are some more numbers to try:
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