A:
Positive:
1 x 213035355 x 426070711 x 193668555 x 38733779 x 269665395 x 53933869 x 245154345 x 4903
Negative:
-1 x -21303535-5 x -4260707-11 x -1936685-55 x -387337-79 x -269665-395 x -53933-869 x -24515-4345 x -4903
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 21,303,535, 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 | 21,303,535 | |
| -1 | -21,303,535 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,303,535.
Example:
1 x 21,303,535 = 21,303,535
and
-1 x -21,303,535 = 21,303,535
Notice both answers equal 21,303,535
With that explanation out of the way, let's continue. Next, we take the number 21,303,535 and divide it by 2:
21,303,535 ÷ 2 = 10,651,767.5
If the quotient is a whole number, then 2 and 10,651,767.5 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 | 21,303,535 | |
| -1 | -21,303,535 |
Now, we try dividing 21,303,535 by 3:
21,303,535 ÷ 3 = 7,101,178.3333
If the quotient is a whole number, then 3 and 7,101,178.3333 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 | 21,303,535 | |
| -1 | -21,303,535 |
Let's try dividing by 4:
21,303,535 ÷ 4 = 5,325,883.75
If the quotient is a whole number, then 4 and 5,325,883.75 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 | 21,303,535 | |
| -1 | 21,303,535 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 79 | 395 | 869 | 4,345 | 4,903 | 24,515 | 53,933 | 269,665 | 387,337 | 1,936,685 | 4,260,707 | 21,303,535 |
| -1 | -5 | -11 | -55 | -79 | -395 | -869 | -4,345 | -4,903 | -24,515 | -53,933 | -269,665 | -387,337 | -1,936,685 | -4,260,707 | -21,303,535 |
Here are some more numbers to try:
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