A:
Positive:
1 x 14211477 x 20302113 x 10931923 x 6178949 x 2900391 x 1561797 x 14651161 x 8827299 x 4753637 x 2231679 x 20931127 x 1261
Negative:
-1 x -1421147-7 x -203021-13 x -109319-23 x -61789-49 x -29003-91 x -15617-97 x -14651-161 x -8827-299 x -4753-637 x -2231-679 x -2093-1127 x -1261
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 1,421,147, 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 | 1,421,147 | |
| -1 | -1,421,147 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,421,147.
Example:
1 x 1,421,147 = 1,421,147
and
-1 x -1,421,147 = 1,421,147
Notice both answers equal 1,421,147
With that explanation out of the way, let's continue. Next, we take the number 1,421,147 and divide it by 2:
1,421,147 ÷ 2 = 710,573.5
If the quotient is a whole number, then 2 and 710,573.5 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 | 1,421,147 | |
| -1 | -1,421,147 |
Now, we try dividing 1,421,147 by 3:
1,421,147 ÷ 3 = 473,715.6667
If the quotient is a whole number, then 3 and 473,715.6667 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 | 1,421,147 | |
| -1 | -1,421,147 |
Let's try dividing by 4:
1,421,147 ÷ 4 = 355,286.75
If the quotient is a whole number, then 4 and 355,286.75 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 | 1,421,147 | |
| -1 | 1,421,147 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 23 | 49 | 91 | 97 | 161 | 299 | 637 | 679 | 1,127 | 1,261 | 2,093 | 2,231 | 4,753 | 8,827 | 14,651 | 15,617 | 29,003 | 61,789 | 109,319 | 203,021 | 1,421,147 |
| -1 | -7 | -13 | -23 | -49 | -91 | -97 | -161 | -299 | -637 | -679 | -1,127 | -1,261 | -2,093 | -2,231 | -4,753 | -8,827 | -14,651 | -15,617 | -29,003 | -61,789 | -109,319 | -203,021 | -1,421,147 |
Here are some more numbers to try:
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