To find all the divisors of the number 124,384:
- 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 124,384:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
124,384 = 25 × 132 × 23
124,384 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 = (5 + 1) × (2 + 1) × (1 + 1) = 6 × 3 × 2 = 36
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 124,384
- 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
composite factor = 2
2 =
4
composite factor = 2
3 =
8
prime factor =
13
composite factor = 2
4 =
16
prime factor =
23
composite factor = 2 × 13 =
26
composite factor = 2
5 =
32
composite factor = 2 × 23 =
46
composite factor = 2
2 × 13 =
52
composite factor = 2
2 × 23 =
92
composite factor = 2
3 × 13 =
104
composite factor = 13
2 =
169
composite factor = 2
3 × 23 =
184
composite factor = 2
4 × 13 =
208
composite factor = 13 × 23 =
299
composite factor = 2 × 13
2 =
338
This list continues below...
... This list continues from above
composite factor = 2
4 × 23 =
368
composite factor = 2
5 × 13 =
416
composite factor = 2 × 13 × 23 =
598
composite factor = 2
2 × 13
2 =
676
composite factor = 2
5 × 23 =
736
composite factor = 2
2 × 13 × 23 =
1,196
composite factor = 2
3 × 13
2 =
1,352
composite factor = 2
3 × 13 × 23 =
2,392
composite factor = 2
4 × 13
2 =
2,704
composite factor = 13
2 × 23 =
3,887
composite factor = 2
4 × 13 × 23 =
4,784
composite factor = 2
5 × 13
2 =
5,408
composite factor = 2 × 13
2 × 23 =
7,774
composite factor = 2
5 × 13 × 23 =
9,568
composite factor = 2
2 × 13
2 × 23 =
15,548
composite factor = 2
3 × 13
2 × 23 =
31,096
composite factor = 2
4 × 13
2 × 23 =
62,192
composite factor = 2
5 × 13
2 × 23 =
124,384
36 factors (divisors)
What times what is 124,384?
What number multiplied by what number equals 124,384?
All the combinations of any two natural numbers whose product equals 124,384.
1 × 124,384 = 124,384
2 × 62,192 = 124,384
4 × 31,096 = 124,384
8 × 15,548 = 124,384
13 × 9,568 = 124,384
16 × 7,774 = 124,384
23 × 5,408 = 124,384
26 × 4,784 = 124,384
32 × 3,887 = 124,384
46 × 2,704 = 124,384
52 × 2,392 = 124,384
92 × 1,352 = 124,384
104 × 1,196 = 124,384
169 × 736 = 124,384
184 × 676 = 124,384
208 × 598 = 124,384
299 × 416 = 124,384
338 × 368 = 124,384
18 unique multiplications The final answer:
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