A:
Positive:
1 x 126412517 x 180589317 x 74360319 x 665329119 x 106229133 x 95047323 x 391372261 x 5591
Negative:
-1 x -12641251-7 x -1805893-17 x -743603-19 x -665329-119 x -106229-133 x -95047-323 x -39137-2261 x -5591
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 12,641,251, 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 | 12,641,251 | |
| -1 | -12,641,251 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,641,251.
Example:
1 x 12,641,251 = 12,641,251
and
-1 x -12,641,251 = 12,641,251
Notice both answers equal 12,641,251
With that explanation out of the way, let's continue. Next, we take the number 12,641,251 and divide it by 2:
12,641,251 ÷ 2 = 6,320,625.5
If the quotient is a whole number, then 2 and 6,320,625.5 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 | 12,641,251 | |
| -1 | -12,641,251 |
Now, we try dividing 12,641,251 by 3:
12,641,251 ÷ 3 = 4,213,750.3333
If the quotient is a whole number, then 3 and 4,213,750.3333 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 | 12,641,251 | |
| -1 | -12,641,251 |
Let's try dividing by 4:
12,641,251 ÷ 4 = 3,160,312.75
If the quotient is a whole number, then 4 and 3,160,312.75 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 | 12,641,251 | |
| -1 | 12,641,251 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 19 | 119 | 133 | 323 | 2,261 | 5,591 | 39,137 | 95,047 | 106,229 | 665,329 | 743,603 | 1,805,893 | 12,641,251 |
| -1 | -7 | -17 | -19 | -119 | -133 | -323 | -2,261 | -5,591 | -39,137 | -95,047 | -106,229 | -665,329 | -743,603 | -1,805,893 | -12,641,251 |
Here are some more numbers to try:
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