A:
Positive:
1 x 6362636217 x 9089480319 x 33487559133 x 47839371753 x 3629572729 x 23314912271 x 5185119103 x 33307
Negative:
-1 x -636263621-7 x -90894803-19 x -33487559-133 x -4783937-1753 x -362957-2729 x -233149-12271 x -51851-19103 x -33307
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 636,263,621, 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 | 636,263,621 | |
| -1 | -636,263,621 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 636,263,621.
Example:
1 x 636,263,621 = 636,263,621
and
-1 x -636,263,621 = 636,263,621
Notice both answers equal 636,263,621
With that explanation out of the way, let's continue. Next, we take the number 636,263,621 and divide it by 2:
636,263,621 ÷ 2 = 318,131,810.5
If the quotient is a whole number, then 2 and 318,131,810.5 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 | 636,263,621 | |
| -1 | -636,263,621 |
Now, we try dividing 636,263,621 by 3:
636,263,621 ÷ 3 = 212,087,873.6667
If the quotient is a whole number, then 3 and 212,087,873.6667 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 | 636,263,621 | |
| -1 | -636,263,621 |
Let's try dividing by 4:
636,263,621 ÷ 4 = 159,065,905.25
If the quotient is a whole number, then 4 and 159,065,905.25 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 | 636,263,621 | |
| -1 | 636,263,621 |
If you did it right, you will end up with this table:
| 1 | 7 | 19 | 133 | 1,753 | 2,729 | 12,271 | 19,103 | 33,307 | 51,851 | 233,149 | 362,957 | 4,783,937 | 33,487,559 | 90,894,803 | 636,263,621 |
| -1 | -7 | -19 | -133 | -1,753 | -2,729 | -12,271 | -19,103 | -33,307 | -51,851 | -233,149 | -362,957 | -4,783,937 | -33,487,559 | -90,894,803 | -636,263,621 |
Here are some more numbers to try:
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