A:
Positive:
1 x 1654065497 x 2362950711 x 1503695917 x 972979777 x 2148137119 x 1389971187 x 884527289 x 5723411309 x 1263612023 x 817633179 x 520317433 x 22253
Negative:
-1 x -165406549-7 x -23629507-11 x -15036959-17 x -9729797-77 x -2148137-119 x -1389971-187 x -884527-289 x -572341-1309 x -126361-2023 x -81763-3179 x -52031-7433 x -22253
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 165,406,549, 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 | 165,406,549 | |
| -1 | -165,406,549 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 165,406,549.
Example:
1 x 165,406,549 = 165,406,549
and
-1 x -165,406,549 = 165,406,549
Notice both answers equal 165,406,549
With that explanation out of the way, let's continue. Next, we take the number 165,406,549 and divide it by 2:
165,406,549 ÷ 2 = 82,703,274.5
If the quotient is a whole number, then 2 and 82,703,274.5 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 | 165,406,549 | |
| -1 | -165,406,549 |
Now, we try dividing 165,406,549 by 3:
165,406,549 ÷ 3 = 55,135,516.3333
If the quotient is a whole number, then 3 and 55,135,516.3333 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 | 165,406,549 | |
| -1 | -165,406,549 |
Let's try dividing by 4:
165,406,549 ÷ 4 = 41,351,637.25
If the quotient is a whole number, then 4 and 41,351,637.25 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 | 165,406,549 | |
| -1 | 165,406,549 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 17 | 77 | 119 | 187 | 289 | 1,309 | 2,023 | 3,179 | 7,433 | 22,253 | 52,031 | 81,763 | 126,361 | 572,341 | 884,527 | 1,389,971 | 2,148,137 | 9,729,797 | 15,036,959 | 23,629,507 | 165,406,549 |
| -1 | -7 | -11 | -17 | -77 | -119 | -187 | -289 | -1,309 | -2,023 | -3,179 | -7,433 | -22,253 | -52,031 | -81,763 | -126,361 | -572,341 | -884,527 | -1,389,971 | -2,148,137 | -9,729,797 | -15,036,959 | -23,629,507 | -165,406,549 |
Here are some more numbers to try:
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