A:
Positive:
1 x 7213433717 x 10304905317 x 4243196331 x 23269141119 x 6061709217 x 3324163527 x 13687733689 x 195539
Negative:
-1 x -721343371-7 x -103049053-17 x -42431963-31 x -23269141-119 x -6061709-217 x -3324163-527 x -1368773-3689 x -195539
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 721,343,371, 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 | 721,343,371 | |
| -1 | -721,343,371 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 721,343,371.
Example:
1 x 721,343,371 = 721,343,371
and
-1 x -721,343,371 = 721,343,371
Notice both answers equal 721,343,371
With that explanation out of the way, let's continue. Next, we take the number 721,343,371 and divide it by 2:
721,343,371 ÷ 2 = 360,671,685.5
If the quotient is a whole number, then 2 and 360,671,685.5 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 | 721,343,371 | |
| -1 | -721,343,371 |
Now, we try dividing 721,343,371 by 3:
721,343,371 ÷ 3 = 240,447,790.3333
If the quotient is a whole number, then 3 and 240,447,790.3333 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 | 721,343,371 | |
| -1 | -721,343,371 |
Let's try dividing by 4:
721,343,371 ÷ 4 = 180,335,842.75
If the quotient is a whole number, then 4 and 180,335,842.75 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 | 721,343,371 | |
| -1 | 721,343,371 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 31 | 119 | 217 | 527 | 3,689 | 195,539 | 1,368,773 | 3,324,163 | 6,061,709 | 23,269,141 | 42,431,963 | 103,049,053 | 721,343,371 |
| -1 | -7 | -17 | -31 | -119 | -217 | -527 | -3,689 | -195,539 | -1,368,773 | -3,324,163 | -6,061,709 | -23,269,141 | -42,431,963 | -103,049,053 | -721,343,371 |
Here are some more numbers to try:
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