A:
Positive:
1 x 7813823755 x 15627647525 x 31255295125 x 6251059277 x 28208751385 x 5641756925 x 11283522567 x 34625
Negative:
-1 x -781382375-5 x -156276475-25 x -31255295-125 x -6251059-277 x -2820875-1385 x -564175-6925 x -112835-22567 x -34625
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 781,382,375, 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 | 781,382,375 | |
| -1 | -781,382,375 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 781,382,375.
Example:
1 x 781,382,375 = 781,382,375
and
-1 x -781,382,375 = 781,382,375
Notice both answers equal 781,382,375
With that explanation out of the way, let's continue. Next, we take the number 781,382,375 and divide it by 2:
781,382,375 ÷ 2 = 390,691,187.5
If the quotient is a whole number, then 2 and 390,691,187.5 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 | 781,382,375 | |
| -1 | -781,382,375 |
Now, we try dividing 781,382,375 by 3:
781,382,375 ÷ 3 = 260,460,791.6667
If the quotient is a whole number, then 3 and 260,460,791.6667 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 | 781,382,375 | |
| -1 | -781,382,375 |
Let's try dividing by 4:
781,382,375 ÷ 4 = 195,345,593.75
If the quotient is a whole number, then 4 and 195,345,593.75 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 | 781,382,375 | |
| -1 | 781,382,375 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 125 | 277 | 1,385 | 6,925 | 22,567 | 34,625 | 112,835 | 564,175 | 2,820,875 | 6,251,059 | 31,255,295 | 156,276,475 | 781,382,375 |
| -1 | -5 | -25 | -125 | -277 | -1,385 | -6,925 | -22,567 | -34,625 | -112,835 | -564,175 | -2,820,875 | -6,251,059 | -31,255,295 | -156,276,475 | -781,382,375 |
Here are some more numbers to try:
Try the factor calculator