To find all the divisors of the number 86,268:
- 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 86,268:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
86,268 = 22 × 3 × 7 × 13 × 79
86,268 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 = (2 + 1) × (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 3 × 2 × 2 × 2 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 86,268
- 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
prime factor =
7
composite factor = 2
2 × 3 =
12
prime factor =
13
composite factor = 2 × 7 =
14
composite factor = 3 × 7 =
21
composite factor = 2 × 13 =
26
composite factor = 2
2 × 7 =
28
composite factor = 3 × 13 =
39
composite factor = 2 × 3 × 7 =
42
composite factor = 2
2 × 13 =
52
composite factor = 2 × 3 × 13 =
78
prime factor =
79
composite factor = 2
2 × 3 × 7 =
84
composite factor = 7 × 13 =
91
composite factor = 2
2 × 3 × 13 =
156
composite factor = 2 × 79 =
158
composite factor = 2 × 7 × 13 =
182
composite factor = 3 × 79 =
237
composite factor = 3 × 7 × 13 =
273
This list continues below...
... This list continues from above
composite factor = 2
2 × 79 =
316
composite factor = 2
2 × 7 × 13 =
364
composite factor = 2 × 3 × 79 =
474
composite factor = 2 × 3 × 7 × 13 =
546
composite factor = 7 × 79 =
553
composite factor = 2
2 × 3 × 79 =
948
composite factor = 13 × 79 =
1,027
composite factor = 2
2 × 3 × 7 × 13 =
1,092
composite factor = 2 × 7 × 79 =
1,106
composite factor = 3 × 7 × 79 =
1,659
composite factor = 2 × 13 × 79 =
2,054
composite factor = 2
2 × 7 × 79 =
2,212
composite factor = 3 × 13 × 79 =
3,081
composite factor = 2 × 3 × 7 × 79 =
3,318
composite factor = 2
2 × 13 × 79 =
4,108
composite factor = 2 × 3 × 13 × 79 =
6,162
composite factor = 2
2 × 3 × 7 × 79 =
6,636
composite factor = 7 × 13 × 79 =
7,189
composite factor = 2
2 × 3 × 13 × 79 =
12,324
composite factor = 2 × 7 × 13 × 79 =
14,378
composite factor = 3 × 7 × 13 × 79 =
21,567
composite factor = 2
2 × 7 × 13 × 79 =
28,756
composite factor = 2 × 3 × 7 × 13 × 79 =
43,134
composite factor = 2
2 × 3 × 7 × 13 × 79 =
86,268
48 factors (divisors)
What times what is 86,268?
What number multiplied by what number equals 86,268?
All the combinations of any two natural numbers whose product equals 86,268.
1 × 86,268 = 86,268
2 × 43,134 = 86,268
3 × 28,756 = 86,268
4 × 21,567 = 86,268
6 × 14,378 = 86,268
7 × 12,324 = 86,268
12 × 7,189 = 86,268
13 × 6,636 = 86,268
14 × 6,162 = 86,268
21 × 4,108 = 86,268
26 × 3,318 = 86,268
28 × 3,081 = 86,268
39 × 2,212 = 86,268
42 × 2,054 = 86,268
52 × 1,659 = 86,268
78 × 1,106 = 86,268
79 × 1,092 = 86,268
84 × 1,027 = 86,268
91 × 948 = 86,268
156 × 553 = 86,268
158 × 546 = 86,268
182 × 474 = 86,268
237 × 364 = 86,268
273 × 316 = 86,268
24 unique multiplications The final answer:
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