A:
Positive:
1 x 21151755 x 42303519 x 11132525 x 8460761 x 3467573 x 2897595 x 22265305 x 6935365 x 5795475 x 44531159 x 18251387 x 1525
Negative:
-1 x -2115175-5 x -423035-19 x -111325-25 x -84607-61 x -34675-73 x -28975-95 x -22265-305 x -6935-365 x -5795-475 x -4453-1159 x -1825-1387 x -1525
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 2,115,175, 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 | 2,115,175 | |
| -1 | -2,115,175 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 2,115,175.
Example:
1 x 2,115,175 = 2,115,175
and
-1 x -2,115,175 = 2,115,175
Notice both answers equal 2,115,175
With that explanation out of the way, let's continue. Next, we take the number 2,115,175 and divide it by 2:
2,115,175 ÷ 2 = 1,057,587.5
If the quotient is a whole number, then 2 and 1,057,587.5 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 | 2,115,175 | |
| -1 | -2,115,175 |
Now, we try dividing 2,115,175 by 3:
2,115,175 ÷ 3 = 705,058.3333
If the quotient is a whole number, then 3 and 705,058.3333 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 | 2,115,175 | |
| -1 | -2,115,175 |
Let's try dividing by 4:
2,115,175 ÷ 4 = 528,793.75
If the quotient is a whole number, then 4 and 528,793.75 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 | 2,115,175 | |
| -1 | 2,115,175 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 25 | 61 | 73 | 95 | 305 | 365 | 475 | 1,159 | 1,387 | 1,525 | 1,825 | 4,453 | 5,795 | 6,935 | 22,265 | 28,975 | 34,675 | 84,607 | 111,325 | 423,035 | 2,115,175 |
| -1 | -5 | -19 | -25 | -61 | -73 | -95 | -305 | -365 | -475 | -1,159 | -1,387 | -1,525 | -1,825 | -4,453 | -5,795 | -6,935 | -22,265 | -28,975 | -34,675 | -84,607 | -111,325 | -423,035 | -2,115,175 |
Here are some more numbers to try:
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