A:
Positive:
1 x 79286417 x 113266343 x 18438749 x 16180953 x 14959771 x 111671301 x 26341371 x 21371497 x 159532107 x 37632279 x 34792597 x 3053
Negative:
-1 x -7928641-7 x -1132663-43 x -184387-49 x -161809-53 x -149597-71 x -111671-301 x -26341-371 x -21371-497 x -15953-2107 x -3763-2279 x -3479-2597 x -3053
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 7,928,641, 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 | 7,928,641 | |
| -1 | -7,928,641 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,928,641.
Example:
1 x 7,928,641 = 7,928,641
and
-1 x -7,928,641 = 7,928,641
Notice both answers equal 7,928,641
With that explanation out of the way, let's continue. Next, we take the number 7,928,641 and divide it by 2:
7,928,641 ÷ 2 = 3,964,320.5
If the quotient is a whole number, then 2 and 3,964,320.5 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 | 7,928,641 | |
| -1 | -7,928,641 |
Now, we try dividing 7,928,641 by 3:
7,928,641 ÷ 3 = 2,642,880.3333
If the quotient is a whole number, then 3 and 2,642,880.3333 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 | 7,928,641 | |
| -1 | -7,928,641 |
Let's try dividing by 4:
7,928,641 ÷ 4 = 1,982,160.25
If the quotient is a whole number, then 4 and 1,982,160.25 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 | 7,928,641 | |
| -1 | 7,928,641 |
If you did it right, you will end up with this table:
| 1 | 7 | 43 | 49 | 53 | 71 | 301 | 371 | 497 | 2,107 | 2,279 | 2,597 | 3,053 | 3,479 | 3,763 | 15,953 | 21,371 | 26,341 | 111,671 | 149,597 | 161,809 | 184,387 | 1,132,663 | 7,928,641 |
| -1 | -7 | -43 | -49 | -53 | -71 | -301 | -371 | -497 | -2,107 | -2,279 | -2,597 | -3,053 | -3,479 | -3,763 | -15,953 | -21,371 | -26,341 | -111,671 | -149,597 | -161,809 | -184,387 | -1,132,663 | -7,928,641 |
Here are some more numbers to try:
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