A:
Positive:
1 x 12912977 x 18447119 x 6796349 x 2635373 x 17689133 x 9709361 x 3577511 x 2527931 x 1387
Negative:
-1 x -1291297-7 x -184471-19 x -67963-49 x -26353-73 x -17689-133 x -9709-361 x -3577-511 x -2527-931 x -1387
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 1,291,297, 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 | 1,291,297 | |
| -1 | -1,291,297 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,291,297.
Example:
1 x 1,291,297 = 1,291,297
and
-1 x -1,291,297 = 1,291,297
Notice both answers equal 1,291,297
With that explanation out of the way, let's continue. Next, we take the number 1,291,297 and divide it by 2:
1,291,297 ÷ 2 = 645,648.5
If the quotient is a whole number, then 2 and 645,648.5 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 | 1,291,297 | |
| -1 | -1,291,297 |
Now, we try dividing 1,291,297 by 3:
1,291,297 ÷ 3 = 430,432.3333
If the quotient is a whole number, then 3 and 430,432.3333 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 | 1,291,297 | |
| -1 | -1,291,297 |
Let's try dividing by 4:
1,291,297 ÷ 4 = 322,824.25
If the quotient is a whole number, then 4 and 322,824.25 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 | 1,291,297 | |
| -1 | 1,291,297 |
If you did it right, you will end up with this table:
| 1 | 7 | 19 | 49 | 73 | 133 | 361 | 511 | 931 | 1,387 | 2,527 | 3,577 | 9,709 | 17,689 | 26,353 | 67,963 | 184,471 | 1,291,297 |
| -1 | -7 | -19 | -49 | -73 | -133 | -361 | -511 | -931 | -1,387 | -2,527 | -3,577 | -9,709 | -17,689 | -26,353 | -67,963 | -184,471 | -1,291,297 |
Here are some more numbers to try:
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