A:
Positive:
1 x 7153752111 x 650341123 x 3110327157 x 455653253 x 2827571727 x 414231801 x 397213611 x 19811
Negative:
-1 x -71537521-11 x -6503411-23 x -3110327-157 x -455653-253 x -282757-1727 x -41423-1801 x -39721-3611 x -19811
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 71,537,521, 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 | 71,537,521 | |
| -1 | -71,537,521 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 71,537,521.
Example:
1 x 71,537,521 = 71,537,521
and
-1 x -71,537,521 = 71,537,521
Notice both answers equal 71,537,521
With that explanation out of the way, let's continue. Next, we take the number 71,537,521 and divide it by 2:
71,537,521 ÷ 2 = 35,768,760.5
If the quotient is a whole number, then 2 and 35,768,760.5 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 | 71,537,521 | |
| -1 | -71,537,521 |
Now, we try dividing 71,537,521 by 3:
71,537,521 ÷ 3 = 23,845,840.3333
If the quotient is a whole number, then 3 and 23,845,840.3333 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 | 71,537,521 | |
| -1 | -71,537,521 |
Let's try dividing by 4:
71,537,521 ÷ 4 = 17,884,380.25
If the quotient is a whole number, then 4 and 17,884,380.25 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 | 71,537,521 | |
| -1 | 71,537,521 |
If you did it right, you will end up with this table:
| 1 | 11 | 23 | 157 | 253 | 1,727 | 1,801 | 3,611 | 19,811 | 39,721 | 41,423 | 282,757 | 455,653 | 3,110,327 | 6,503,411 | 71,537,521 |
| -1 | -11 | -23 | -157 | -253 | -1,727 | -1,801 | -3,611 | -19,811 | -39,721 | -41,423 | -282,757 | -455,653 | -3,110,327 | -6,503,411 | -71,537,521 |
Here are some more numbers to try:
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