A:
Positive:
1 x 200213455 x 400426919 x 105375573 x 27426595 x 210751365 x 548531387 x 144352887 x 6935
Negative:
-1 x -20021345-5 x -4004269-19 x -1053755-73 x -274265-95 x -210751-365 x -54853-1387 x -14435-2887 x -6935
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 20,021,345, 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 | 20,021,345 | |
| -1 | -20,021,345 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,021,345.
Example:
1 x 20,021,345 = 20,021,345
and
-1 x -20,021,345 = 20,021,345
Notice both answers equal 20,021,345
With that explanation out of the way, let's continue. Next, we take the number 20,021,345 and divide it by 2:
20,021,345 ÷ 2 = 10,010,672.5
If the quotient is a whole number, then 2 and 10,010,672.5 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 | 20,021,345 | |
| -1 | -20,021,345 |
Now, we try dividing 20,021,345 by 3:
20,021,345 ÷ 3 = 6,673,781.6667
If the quotient is a whole number, then 3 and 6,673,781.6667 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 | 20,021,345 | |
| -1 | -20,021,345 |
Let's try dividing by 4:
20,021,345 ÷ 4 = 5,005,336.25
If the quotient is a whole number, then 4 and 5,005,336.25 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 | 20,021,345 | |
| -1 | 20,021,345 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 73 | 95 | 365 | 1,387 | 2,887 | 6,935 | 14,435 | 54,853 | 210,751 | 274,265 | 1,053,755 | 4,004,269 | 20,021,345 |
| -1 | -5 | -19 | -73 | -95 | -365 | -1,387 | -2,887 | -6,935 | -14,435 | -54,853 | -210,751 | -274,265 | -1,053,755 | -4,004,269 | -20,021,345 |
Here are some more numbers to try:
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