A:
Positive:
1 x 198077355 x 396154743 x 460645181 x 109435215 x 92129509 x 38915905 x 218872545 x 7783
Negative:
-1 x -19807735-5 x -3961547-43 x -460645-181 x -109435-215 x -92129-509 x -38915-905 x -21887-2545 x -7783
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 19,807,735, 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 | 19,807,735 | |
| -1 | -19,807,735 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 19,807,735.
Example:
1 x 19,807,735 = 19,807,735
and
-1 x -19,807,735 = 19,807,735
Notice both answers equal 19,807,735
With that explanation out of the way, let's continue. Next, we take the number 19,807,735 and divide it by 2:
19,807,735 ÷ 2 = 9,903,867.5
If the quotient is a whole number, then 2 and 9,903,867.5 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 | 19,807,735 | |
| -1 | -19,807,735 |
Now, we try dividing 19,807,735 by 3:
19,807,735 ÷ 3 = 6,602,578.3333
If the quotient is a whole number, then 3 and 6,602,578.3333 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 | 19,807,735 | |
| -1 | -19,807,735 |
Let's try dividing by 4:
19,807,735 ÷ 4 = 4,951,933.75
If the quotient is a whole number, then 4 and 4,951,933.75 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 | 19,807,735 | |
| -1 | 19,807,735 |
If you did it right, you will end up with this table:
| 1 | 5 | 43 | 181 | 215 | 509 | 905 | 2,545 | 7,783 | 21,887 | 38,915 | 92,129 | 109,435 | 460,645 | 3,961,547 | 19,807,735 |
| -1 | -5 | -43 | -181 | -215 | -509 | -905 | -2,545 | -7,783 | -21,887 | -38,915 | -92,129 | -109,435 | -460,645 | -3,961,547 | -19,807,735 |
Here are some more numbers to try:
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