A:
Positive:
1 x 21435055 x 4287017 x 30621513 x 16488535 x 6124349 x 4374565 x 3297791 x 23555245 x 8749455 x 4711637 x 3365673 x 3185
Negative:
-1 x -2143505-5 x -428701-7 x -306215-13 x -164885-35 x -61243-49 x -43745-65 x -32977-91 x -23555-245 x -8749-455 x -4711-637 x -3365-673 x -3185
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 2,143,505, 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 | 2,143,505 | |
| -1 | -2,143,505 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 2,143,505.
Example:
1 x 2,143,505 = 2,143,505
and
-1 x -2,143,505 = 2,143,505
Notice both answers equal 2,143,505
With that explanation out of the way, let's continue. Next, we take the number 2,143,505 and divide it by 2:
2,143,505 ÷ 2 = 1,071,752.5
If the quotient is a whole number, then 2 and 1,071,752.5 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 | 2,143,505 | |
| -1 | -2,143,505 |
Now, we try dividing 2,143,505 by 3:
2,143,505 ÷ 3 = 714,501.6667
If the quotient is a whole number, then 3 and 714,501.6667 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 | 2,143,505 | |
| -1 | -2,143,505 |
Let's try dividing by 4:
2,143,505 ÷ 4 = 535,876.25
If the quotient is a whole number, then 4 and 535,876.25 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 | 2,143,505 | |
| -1 | 2,143,505 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 13 | 35 | 49 | 65 | 91 | 245 | 455 | 637 | 673 | 3,185 | 3,365 | 4,711 | 8,749 | 23,555 | 32,977 | 43,745 | 61,243 | 164,885 | 306,215 | 428,701 | 2,143,505 |
| -1 | -5 | -7 | -13 | -35 | -49 | -65 | -91 | -245 | -455 | -637 | -673 | -3,185 | -3,365 | -4,711 | -8,749 | -23,555 | -32,977 | -43,745 | -61,243 | -164,885 | -306,215 | -428,701 | -2,143,505 |
Here are some more numbers to try:
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