A:
Positive:
1 x 213735555 x 42747117 x 305336523 x 92928535 x 61067349 x 436195115 x 185857161 x 132755245 x 87239805 x 265511127 x 189653793 x 5635
Negative:
-1 x -21373555-5 x -4274711-7 x -3053365-23 x -929285-35 x -610673-49 x -436195-115 x -185857-161 x -132755-245 x -87239-805 x -26551-1127 x -18965-3793 x -5635
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 21,373,555, 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 | 21,373,555 | |
| -1 | -21,373,555 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,373,555.
Example:
1 x 21,373,555 = 21,373,555
and
-1 x -21,373,555 = 21,373,555
Notice both answers equal 21,373,555
With that explanation out of the way, let's continue. Next, we take the number 21,373,555 and divide it by 2:
21,373,555 ÷ 2 = 10,686,777.5
If the quotient is a whole number, then 2 and 10,686,777.5 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 | 21,373,555 | |
| -1 | -21,373,555 |
Now, we try dividing 21,373,555 by 3:
21,373,555 ÷ 3 = 7,124,518.3333
If the quotient is a whole number, then 3 and 7,124,518.3333 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 | 21,373,555 | |
| -1 | -21,373,555 |
Let's try dividing by 4:
21,373,555 ÷ 4 = 5,343,388.75
If the quotient is a whole number, then 4 and 5,343,388.75 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 | 21,373,555 | |
| -1 | 21,373,555 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 23 | 35 | 49 | 115 | 161 | 245 | 805 | 1,127 | 3,793 | 5,635 | 18,965 | 26,551 | 87,239 | 132,755 | 185,857 | 436,195 | 610,673 | 929,285 | 3,053,365 | 4,274,711 | 21,373,555 |
| -1 | -5 | -7 | -23 | -35 | -49 | -115 | -161 | -245 | -805 | -1,127 | -3,793 | -5,635 | -18,965 | -26,551 | -87,239 | -132,755 | -185,857 | -436,195 | -610,673 | -929,285 | -3,053,365 | -4,274,711 | -21,373,555 |
Here are some more numbers to try:
Try the factor calculator