A:
Positive:
1 x 21426655 x 4285337 x 30609529 x 7388535 x 61219145 x 14777203 x 105551015 x 2111
Negative:
-1 x -2142665-5 x -428533-7 x -306095-29 x -73885-35 x -61219-145 x -14777-203 x -10555-1015 x -2111
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 2,142,665, 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 | 2,142,665 | |
| -1 | -2,142,665 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 2,142,665.
Example:
1 x 2,142,665 = 2,142,665
and
-1 x -2,142,665 = 2,142,665
Notice both answers equal 2,142,665
With that explanation out of the way, let's continue. Next, we take the number 2,142,665 and divide it by 2:
2,142,665 ÷ 2 = 1,071,332.5
If the quotient is a whole number, then 2 and 1,071,332.5 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 | 2,142,665 | |
| -1 | -2,142,665 |
Now, we try dividing 2,142,665 by 3:
2,142,665 ÷ 3 = 714,221.6667
If the quotient is a whole number, then 3 and 714,221.6667 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 | 2,142,665 | |
| -1 | -2,142,665 |
Let's try dividing by 4:
2,142,665 ÷ 4 = 535,666.25
If the quotient is a whole number, then 4 and 535,666.25 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 | 2,142,665 | |
| -1 | 2,142,665 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 29 | 35 | 145 | 203 | 1,015 | 2,111 | 10,555 | 14,777 | 61,219 | 73,885 | 306,095 | 428,533 | 2,142,665 |
| -1 | -5 | -7 | -29 | -35 | -145 | -203 | -1,015 | -2,111 | -10,555 | -14,777 | -61,219 | -73,885 | -306,095 | -428,533 | -2,142,665 |
Here are some more numbers to try:
Try the factor calculator