A:
Positive:
1 x 7789741713 x 599210917 x 458220141 x 1899937221 x 352477533 x 146149697 x 1117618597 x 9061
Negative:
-1 x -77897417-13 x -5992109-17 x -4582201-41 x -1899937-221 x -352477-533 x -146149-697 x -111761-8597 x -9061
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 77,897,417, 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 | 77,897,417 | |
| -1 | -77,897,417 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 77,897,417.
Example:
1 x 77,897,417 = 77,897,417
and
-1 x -77,897,417 = 77,897,417
Notice both answers equal 77,897,417
With that explanation out of the way, let's continue. Next, we take the number 77,897,417 and divide it by 2:
77,897,417 ÷ 2 = 38,948,708.5
If the quotient is a whole number, then 2 and 38,948,708.5 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 | 77,897,417 | |
| -1 | -77,897,417 |
Now, we try dividing 77,897,417 by 3:
77,897,417 ÷ 3 = 25,965,805.6667
If the quotient is a whole number, then 3 and 25,965,805.6667 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 | 77,897,417 | |
| -1 | -77,897,417 |
Let's try dividing by 4:
77,897,417 ÷ 4 = 19,474,354.25
If the quotient is a whole number, then 4 and 19,474,354.25 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 | 77,897,417 | |
| -1 | 77,897,417 |
If you did it right, you will end up with this table:
| 1 | 13 | 17 | 41 | 221 | 533 | 697 | 8,597 | 9,061 | 111,761 | 146,149 | 352,477 | 1,899,937 | 4,582,201 | 5,992,109 | 77,897,417 |
| -1 | -13 | -17 | -41 | -221 | -533 | -697 | -8,597 | -9,061 | -111,761 | -146,149 | -352,477 | -1,899,937 | -4,582,201 | -5,992,109 | -77,897,417 |
Here are some more numbers to try:
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