A:
Positive:
1 x 21004755 x 42009513 x 16157523 x 9132525 x 8401965 x 32315115 x 18265281 x 7475299 x 7025325 x 6463575 x 36531405 x 1495
Negative:
-1 x -2100475-5 x -420095-13 x -161575-23 x -91325-25 x -84019-65 x -32315-115 x -18265-281 x -7475-299 x -7025-325 x -6463-575 x -3653-1405 x -1495
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 2,100,475, 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 | 2,100,475 | |
| -1 | -2,100,475 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 2,100,475.
Example:
1 x 2,100,475 = 2,100,475
and
-1 x -2,100,475 = 2,100,475
Notice both answers equal 2,100,475
With that explanation out of the way, let's continue. Next, we take the number 2,100,475 and divide it by 2:
2,100,475 ÷ 2 = 1,050,237.5
If the quotient is a whole number, then 2 and 1,050,237.5 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 | 2,100,475 | |
| -1 | -2,100,475 |
Now, we try dividing 2,100,475 by 3:
2,100,475 ÷ 3 = 700,158.3333
If the quotient is a whole number, then 3 and 700,158.3333 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 | 2,100,475 | |
| -1 | -2,100,475 |
Let's try dividing by 4:
2,100,475 ÷ 4 = 525,118.75
If the quotient is a whole number, then 4 and 525,118.75 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 | 2,100,475 | |
| -1 | 2,100,475 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 23 | 25 | 65 | 115 | 281 | 299 | 325 | 575 | 1,405 | 1,495 | 3,653 | 6,463 | 7,025 | 7,475 | 18,265 | 32,315 | 84,019 | 91,325 | 161,575 | 420,095 | 2,100,475 |
| -1 | -5 | -13 | -23 | -25 | -65 | -115 | -281 | -299 | -325 | -575 | -1,405 | -1,495 | -3,653 | -6,463 | -7,025 | -7,475 | -18,265 | -32,315 | -84,019 | -91,325 | -161,575 | -420,095 | -2,100,475 |
Here are some more numbers to try:
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