A:
Positive:
1 x 7802755 x 15605523 x 3392525 x 3121159 x 13225115 x 6785295 x 2645529 x 1475575 x 1357
Negative:
-1 x -780275-5 x -156055-23 x -33925-25 x -31211-59 x -13225-115 x -6785-295 x -2645-529 x -1475-575 x -1357
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 780,275, 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 | 780,275 | |
| -1 | -780,275 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 780,275.
Example:
1 x 780,275 = 780,275
and
-1 x -780,275 = 780,275
Notice both answers equal 780,275
With that explanation out of the way, let's continue. Next, we take the number 780,275 and divide it by 2:
780,275 ÷ 2 = 390,137.5
If the quotient is a whole number, then 2 and 390,137.5 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 | 780,275 | |
| -1 | -780,275 |
Now, we try dividing 780,275 by 3:
780,275 ÷ 3 = 260,091.6667
If the quotient is a whole number, then 3 and 260,091.6667 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 | 780,275 | |
| -1 | -780,275 |
Let's try dividing by 4:
780,275 ÷ 4 = 195,068.75
If the quotient is a whole number, then 4 and 195,068.75 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 | 780,275 | |
| -1 | 780,275 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 25 | 59 | 115 | 295 | 529 | 575 | 1,357 | 1,475 | 2,645 | 6,785 | 13,225 | 31,211 | 33,925 | 156,055 | 780,275 |
| -1 | -5 | -23 | -25 | -59 | -115 | -295 | -529 | -575 | -1,357 | -1,475 | -2,645 | -6,785 | -13,225 | -31,211 | -33,925 | -156,055 | -780,275 |
Here are some more numbers to try:
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