To find all the divisors of the number 83,376:
- 1. Decompose the number into prime factors.
- See how you can find out how many factors (divisors) the number has, without actually calculating them.
- 2. Multiply the prime factors in all their unique combinations, that yield different results.
1. Carry out the prime factorization of the number 83,376:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
83,376 = 24 × 33 × 193
83,376 is not a prime number but a composite one.
- Prime number: a natural number that is divisible (divided evenly) only by 1 and itself. A prime number has exactly two factors: 1 and the number itself.
- Examples of prime numbers: 2 (factors 1, 2), 3 (factors 1, 3), 5 (factors 1, 5), 7 (factors 1, 7), 11 (factors 1, 11), 13 (factors 1, 13), ...
- Composite number: a natural number that has at least one factor other than 1 and itself. So it is neither a prime number nor 1.
- Examples of composite numbers: 4 (it has 3 factors: 1, 2, 4), 6 (it has 4 factors: 1, 2, 3, 6), 8 (it has 4 factors: 1, 2, 4, 8), 9 (it has 3 factors: 1, 3, 9), 10 (it has 4 factors: 1, 2, 5, 10), 12 (it has 6 factors: 1, 2, 3, 4, 6, 12), ...
How to count the number of factors of a number?
Without actually finding the factors
- If a number N is prime factorized as:
N = am × bk × cz
where a, b, c are the prime factors and m, k, z are their exponents, natural numbers, .... - ...
- Then the number of factors of the number N can be calculated as:
n = (m + 1) × (k + 1) × (z + 1) - ...
- In our case, the number of factors is calculated as:
- n = (4 + 1) × (3 + 1) × (1 + 1) = 5 × 4 × 2 = 40
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 83,376
- Multiply the prime factors involved in the prime factorization of the number in all their unique combinations, that give different results.
- Also consider the exponents of these prime factors.
- Also add 1 to the list of factors (divisors). All the numbers are divisible by 1.
All the factors (divisors) are listed below - in ascending order
The list of factors (divisors):
Numbers other than 1 that are not prime factors are composite factors (divisors).
neither prime nor composite =
1
prime factor =
2
prime factor =
3
composite factor = 2
2 =
4
composite factor = 2 × 3 =
6
composite factor = 2
3 =
8
composite factor = 3
2 =
9
composite factor = 2
2 × 3 =
12
composite factor = 2
4 =
16
composite factor = 2 × 3
2 =
18
composite factor = 2
3 × 3 =
24
composite factor = 3
3 =
27
composite factor = 2
2 × 3
2 =
36
composite factor = 2
4 × 3 =
48
composite factor = 2 × 3
3 =
54
composite factor = 2
3 × 3
2 =
72
composite factor = 2
2 × 3
3 =
108
composite factor = 2
4 × 3
2 =
144
prime factor =
193
composite factor = 2
3 × 3
3 =
216
This list continues below...
... This list continues from above
composite factor = 2 × 193 =
386
composite factor = 2
4 × 3
3 =
432
composite factor = 3 × 193 =
579
composite factor = 2
2 × 193 =
772
composite factor = 2 × 3 × 193 =
1,158
composite factor = 2
3 × 193 =
1,544
composite factor = 3
2 × 193 =
1,737
composite factor = 2
2 × 3 × 193 =
2,316
composite factor = 2
4 × 193 =
3,088
composite factor = 2 × 3
2 × 193 =
3,474
composite factor = 2
3 × 3 × 193 =
4,632
composite factor = 3
3 × 193 =
5,211
composite factor = 2
2 × 3
2 × 193 =
6,948
composite factor = 2
4 × 3 × 193 =
9,264
composite factor = 2 × 3
3 × 193 =
10,422
composite factor = 2
3 × 3
2 × 193 =
13,896
composite factor = 2
2 × 3
3 × 193 =
20,844
composite factor = 2
4 × 3
2 × 193 =
27,792
composite factor = 2
3 × 3
3 × 193 =
41,688
composite factor = 2
4 × 3
3 × 193 =
83,376
40 factors (divisors)
What times what is 83,376?
What number multiplied by what number equals 83,376?
All the combinations of any two natural numbers whose product equals 83,376.
1 × 83,376 = 83,376
2 × 41,688 = 83,376
3 × 27,792 = 83,376
4 × 20,844 = 83,376
6 × 13,896 = 83,376
8 × 10,422 = 83,376
9 × 9,264 = 83,376
12 × 6,948 = 83,376
16 × 5,211 = 83,376
18 × 4,632 = 83,376
24 × 3,474 = 83,376
27 × 3,088 = 83,376
36 × 2,316 = 83,376
48 × 1,737 = 83,376
54 × 1,544 = 83,376
72 × 1,158 = 83,376
108 × 772 = 83,376
144 × 579 = 83,376
193 × 432 = 83,376
216 × 386 = 83,376
20 unique multiplications The final answer:
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