A:
Positive:
1 x 206304555 x 412609129 x 71139579 x 261145145 x 142279395 x 522291801 x 114552291 x 9005
Negative:
-1 x -20630455-5 x -4126091-29 x -711395-79 x -261145-145 x -142279-395 x -52229-1801 x -11455-2291 x -9005
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 20,630,455, 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 | 20,630,455 | |
| -1 | -20,630,455 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,630,455.
Example:
1 x 20,630,455 = 20,630,455
and
-1 x -20,630,455 = 20,630,455
Notice both answers equal 20,630,455
With that explanation out of the way, let's continue. Next, we take the number 20,630,455 and divide it by 2:
20,630,455 ÷ 2 = 10,315,227.5
If the quotient is a whole number, then 2 and 10,315,227.5 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 | 20,630,455 | |
| -1 | -20,630,455 |
Now, we try dividing 20,630,455 by 3:
20,630,455 ÷ 3 = 6,876,818.3333
If the quotient is a whole number, then 3 and 6,876,818.3333 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 | 20,630,455 | |
| -1 | -20,630,455 |
Let's try dividing by 4:
20,630,455 ÷ 4 = 5,157,613.75
If the quotient is a whole number, then 4 and 5,157,613.75 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 | 20,630,455 | |
| -1 | 20,630,455 |
If you did it right, you will end up with this table:
| 1 | 5 | 29 | 79 | 145 | 395 | 1,801 | 2,291 | 9,005 | 11,455 | 52,229 | 142,279 | 261,145 | 711,395 | 4,126,091 | 20,630,455 |
| -1 | -5 | -29 | -79 | -145 | -395 | -1,801 | -2,291 | -9,005 | -11,455 | -52,229 | -142,279 | -261,145 | -711,395 | -4,126,091 | -20,630,455 |
Here are some more numbers to try:
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