A:
Positive:
1 x 813532255 x 1627064525 x 325412941 x 1984225139 x 585275205 x 396845571 x 142475695 x 1170551025 x 793692855 x 284953475 x 234115699 x 14275
Negative:
-1 x -81353225-5 x -16270645-25 x -3254129-41 x -1984225-139 x -585275-205 x -396845-571 x -142475-695 x -117055-1025 x -79369-2855 x -28495-3475 x -23411-5699 x -14275
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 81,353,225, 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 | 81,353,225 | |
| -1 | -81,353,225 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 81,353,225.
Example:
1 x 81,353,225 = 81,353,225
and
-1 x -81,353,225 = 81,353,225
Notice both answers equal 81,353,225
With that explanation out of the way, let's continue. Next, we take the number 81,353,225 and divide it by 2:
81,353,225 ÷ 2 = 40,676,612.5
If the quotient is a whole number, then 2 and 40,676,612.5 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 | 81,353,225 | |
| -1 | -81,353,225 |
Now, we try dividing 81,353,225 by 3:
81,353,225 ÷ 3 = 27,117,741.6667
If the quotient is a whole number, then 3 and 27,117,741.6667 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 | 81,353,225 | |
| -1 | -81,353,225 |
Let's try dividing by 4:
81,353,225 ÷ 4 = 20,338,306.25
If the quotient is a whole number, then 4 and 20,338,306.25 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 | 81,353,225 | |
| -1 | 81,353,225 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 41 | 139 | 205 | 571 | 695 | 1,025 | 2,855 | 3,475 | 5,699 | 14,275 | 23,411 | 28,495 | 79,369 | 117,055 | 142,475 | 396,845 | 585,275 | 1,984,225 | 3,254,129 | 16,270,645 | 81,353,225 |
| -1 | -5 | -25 | -41 | -139 | -205 | -571 | -695 | -1,025 | -2,855 | -3,475 | -5,699 | -14,275 | -23,411 | -28,495 | -79,369 | -117,055 | -142,475 | -396,845 | -585,275 | -1,984,225 | -3,254,129 | -16,270,645 | -81,353,225 |
Here are some more numbers to try:
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