A:
Positive:
1 x 214924155 x 42984837 x 307034535 x 614069661 x 32515929 x 231353305 x 65034627 x 4645
Negative:
-1 x -21492415-5 x -4298483-7 x -3070345-35 x -614069-661 x -32515-929 x -23135-3305 x -6503-4627 x -4645
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 21,492,415, 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 | 21,492,415 | |
| -1 | -21,492,415 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,492,415.
Example:
1 x 21,492,415 = 21,492,415
and
-1 x -21,492,415 = 21,492,415
Notice both answers equal 21,492,415
With that explanation out of the way, let's continue. Next, we take the number 21,492,415 and divide it by 2:
21,492,415 ÷ 2 = 10,746,207.5
If the quotient is a whole number, then 2 and 10,746,207.5 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 | 21,492,415 | |
| -1 | -21,492,415 |
Now, we try dividing 21,492,415 by 3:
21,492,415 ÷ 3 = 7,164,138.3333
If the quotient is a whole number, then 3 and 7,164,138.3333 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 | 21,492,415 | |
| -1 | -21,492,415 |
Let's try dividing by 4:
21,492,415 ÷ 4 = 5,373,103.75
If the quotient is a whole number, then 4 and 5,373,103.75 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 | 21,492,415 | |
| -1 | 21,492,415 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 661 | 929 | 3,305 | 4,627 | 4,645 | 6,503 | 23,135 | 32,515 | 614,069 | 3,070,345 | 4,298,483 | 21,492,415 |
| -1 | -5 | -7 | -35 | -661 | -929 | -3,305 | -4,627 | -4,645 | -6,503 | -23,135 | -32,515 | -614,069 | -3,070,345 | -4,298,483 | -21,492,415 |
Here are some more numbers to try:
Try the factor calculator