A:
Positive:
1 x 215445655 x 43089137 x 307779535 x 61555947 x 45839549 x 439685235 x 91679245 x 87937329 x 654851645 x 130971871 x 115152303 x 9355
Negative:
-1 x -21544565-5 x -4308913-7 x -3077795-35 x -615559-47 x -458395-49 x -439685-235 x -91679-245 x -87937-329 x -65485-1645 x -13097-1871 x -11515-2303 x -9355
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 21,544,565, 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 | 21,544,565 | |
| -1 | -21,544,565 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,544,565.
Example:
1 x 21,544,565 = 21,544,565
and
-1 x -21,544,565 = 21,544,565
Notice both answers equal 21,544,565
With that explanation out of the way, let's continue. Next, we take the number 21,544,565 and divide it by 2:
21,544,565 ÷ 2 = 10,772,282.5
If the quotient is a whole number, then 2 and 10,772,282.5 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 | 21,544,565 | |
| -1 | -21,544,565 |
Now, we try dividing 21,544,565 by 3:
21,544,565 ÷ 3 = 7,181,521.6667
If the quotient is a whole number, then 3 and 7,181,521.6667 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 | 21,544,565 | |
| -1 | -21,544,565 |
Let's try dividing by 4:
21,544,565 ÷ 4 = 5,386,141.25
If the quotient is a whole number, then 4 and 5,386,141.25 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 | 21,544,565 | |
| -1 | 21,544,565 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 47 | 49 | 235 | 245 | 329 | 1,645 | 1,871 | 2,303 | 9,355 | 11,515 | 13,097 | 65,485 | 87,937 | 91,679 | 439,685 | 458,395 | 615,559 | 3,077,795 | 4,308,913 | 21,544,565 |
| -1 | -5 | -7 | -35 | -47 | -49 | -235 | -245 | -329 | -1,645 | -1,871 | -2,303 | -9,355 | -11,515 | -13,097 | -65,485 | -87,937 | -91,679 | -439,685 | -458,395 | -615,559 | -3,077,795 | -4,308,913 | -21,544,565 |
Here are some more numbers to try:
Try the factor calculator