A:
Positive:
1 x 790398055 x 1580796113 x 607998543 x 183813565 x 1215997215 x 367627559 x 1413952795 x 28279
Negative:
-1 x -79039805-5 x -15807961-13 x -6079985-43 x -1838135-65 x -1215997-215 x -367627-559 x -141395-2795 x -28279
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 79,039,805, 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 | 79,039,805 | |
| -1 | -79,039,805 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 79,039,805.
Example:
1 x 79,039,805 = 79,039,805
and
-1 x -79,039,805 = 79,039,805
Notice both answers equal 79,039,805
With that explanation out of the way, let's continue. Next, we take the number 79,039,805 and divide it by 2:
79,039,805 ÷ 2 = 39,519,902.5
If the quotient is a whole number, then 2 and 39,519,902.5 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 | 79,039,805 | |
| -1 | -79,039,805 |
Now, we try dividing 79,039,805 by 3:
79,039,805 ÷ 3 = 26,346,601.6667
If the quotient is a whole number, then 3 and 26,346,601.6667 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 | 79,039,805 | |
| -1 | -79,039,805 |
Let's try dividing by 4:
79,039,805 ÷ 4 = 19,759,951.25
If the quotient is a whole number, then 4 and 19,759,951.25 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 | 79,039,805 | |
| -1 | 79,039,805 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 43 | 65 | 215 | 559 | 2,795 | 28,279 | 141,395 | 367,627 | 1,215,997 | 1,838,135 | 6,079,985 | 15,807,961 | 79,039,805 |
| -1 | -5 | -13 | -43 | -65 | -215 | -559 | -2,795 | -28,279 | -141,395 | -367,627 | -1,215,997 | -1,838,135 | -6,079,985 | -15,807,961 | -79,039,805 |
Here are some more numbers to try:
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