A:
Positive:
1 x 77981897 x 111402717 x 45871719 x 410431119 x 65531133 x 58633323 x 241432261 x 3449
Negative:
-1 x -7798189-7 x -1114027-17 x -458717-19 x -410431-119 x -65531-133 x -58633-323 x -24143-2261 x -3449
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 7,798,189, 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 | 7,798,189 | |
| -1 | -7,798,189 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,798,189.
Example:
1 x 7,798,189 = 7,798,189
and
-1 x -7,798,189 = 7,798,189
Notice both answers equal 7,798,189
With that explanation out of the way, let's continue. Next, we take the number 7,798,189 and divide it by 2:
7,798,189 ÷ 2 = 3,899,094.5
If the quotient is a whole number, then 2 and 3,899,094.5 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 | 7,798,189 | |
| -1 | -7,798,189 |
Now, we try dividing 7,798,189 by 3:
7,798,189 ÷ 3 = 2,599,396.3333
If the quotient is a whole number, then 3 and 2,599,396.3333 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 | 7,798,189 | |
| -1 | -7,798,189 |
Let's try dividing by 4:
7,798,189 ÷ 4 = 1,949,547.25
If the quotient is a whole number, then 4 and 1,949,547.25 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 | 7,798,189 | |
| -1 | 7,798,189 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 19 | 119 | 133 | 323 | 2,261 | 3,449 | 24,143 | 58,633 | 65,531 | 410,431 | 458,717 | 1,114,027 | 7,798,189 |
| -1 | -7 | -17 | -19 | -119 | -133 | -323 | -2,261 | -3,449 | -24,143 | -58,633 | -65,531 | -410,431 | -458,717 | -1,114,027 | -7,798,189 |
Here are some more numbers to try:
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