To find all the divisors of the number 162,000:
- 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 162,000:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
162,000 = 24 × 34 × 53
162,000 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) × (4 + 1) × (3 + 1) = 5 × 5 × 4 = 100
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 162,000
- 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
prime factor =
5
composite factor = 2 × 3 =
6
composite factor = 2
3 =
8
composite factor = 3
2 =
9
composite factor = 2 × 5 =
10
composite factor = 2
2 × 3 =
12
composite factor = 3 × 5 =
15
composite factor = 2
4 =
16
composite factor = 2 × 3
2 =
18
composite factor = 2
2 × 5 =
20
composite factor = 2
3 × 3 =
24
composite factor = 5
2 =
25
composite factor = 3
3 =
27
composite factor = 2 × 3 × 5 =
30
composite factor = 2
2 × 3
2 =
36
composite factor = 2
3 × 5 =
40
composite factor = 3
2 × 5 =
45
composite factor = 2
4 × 3 =
48
composite factor = 2 × 5
2 =
50
composite factor = 2 × 3
3 =
54
composite factor = 2
2 × 3 × 5 =
60
composite factor = 2
3 × 3
2 =
72
composite factor = 3 × 5
2 =
75
composite factor = 2
4 × 5 =
80
composite factor = 3
4 =
81
composite factor = 2 × 3
2 × 5 =
90
composite factor = 2
2 × 5
2 =
100
composite factor = 2
2 × 3
3 =
108
composite factor = 2
3 × 3 × 5 =
120
composite factor = 5
3 =
125
composite factor = 3
3 × 5 =
135
composite factor = 2
4 × 3
2 =
144
composite factor = 2 × 3 × 5
2 =
150
composite factor = 2 × 3
4 =
162
composite factor = 2
2 × 3
2 × 5 =
180
composite factor = 2
3 × 5
2 =
200
composite factor = 2
3 × 3
3 =
216
composite factor = 3
2 × 5
2 =
225
composite factor = 2
4 × 3 × 5 =
240
composite factor = 2 × 5
3 =
250
composite factor = 2 × 3
3 × 5 =
270
composite factor = 2
2 × 3 × 5
2 =
300
composite factor = 2
2 × 3
4 =
324
composite factor = 2
3 × 3
2 × 5 =
360
composite factor = 3 × 5
3 =
375
composite factor = 2
4 × 5
2 =
400
This list continues below...
... This list continues from above
composite factor = 3
4 × 5 =
405
composite factor = 2
4 × 3
3 =
432
composite factor = 2 × 3
2 × 5
2 =
450
composite factor = 2
2 × 5
3 =
500
composite factor = 2
2 × 3
3 × 5 =
540
composite factor = 2
3 × 3 × 5
2 =
600
composite factor = 2
3 × 3
4 =
648
composite factor = 3
3 × 5
2 =
675
composite factor = 2
4 × 3
2 × 5 =
720
composite factor = 2 × 3 × 5
3 =
750
composite factor = 2 × 3
4 × 5 =
810
composite factor = 2
2 × 3
2 × 5
2 =
900
composite factor = 2
3 × 5
3 =
1,000
composite factor = 2
3 × 3
3 × 5 =
1,080
composite factor = 3
2 × 5
3 =
1,125
composite factor = 2
4 × 3 × 5
2 =
1,200
composite factor = 2
4 × 3
4 =
1,296
composite factor = 2 × 3
3 × 5
2 =
1,350
composite factor = 2
2 × 3 × 5
3 =
1,500
composite factor = 2
2 × 3
4 × 5 =
1,620
composite factor = 2
3 × 3
2 × 5
2 =
1,800
composite factor = 2
4 × 5
3 =
2,000
composite factor = 3
4 × 5
2 =
2,025
composite factor = 2
4 × 3
3 × 5 =
2,160
composite factor = 2 × 3
2 × 5
3 =
2,250
composite factor = 2
2 × 3
3 × 5
2 =
2,700
composite factor = 2
3 × 3 × 5
3 =
3,000
composite factor = 2
3 × 3
4 × 5 =
3,240
composite factor = 3
3 × 5
3 =
3,375
composite factor = 2
4 × 3
2 × 5
2 =
3,600
composite factor = 2 × 3
4 × 5
2 =
4,050
composite factor = 2
2 × 3
2 × 5
3 =
4,500
composite factor = 2
3 × 3
3 × 5
2 =
5,400
composite factor = 2
4 × 3 × 5
3 =
6,000
composite factor = 2
4 × 3
4 × 5 =
6,480
composite factor = 2 × 3
3 × 5
3 =
6,750
composite factor = 2
2 × 3
4 × 5
2 =
8,100
composite factor = 2
3 × 3
2 × 5
3 =
9,000
composite factor = 3
4 × 5
3 =
10,125
composite factor = 2
4 × 3
3 × 5
2 =
10,800
composite factor = 2
2 × 3
3 × 5
3 =
13,500
composite factor = 2
3 × 3
4 × 5
2 =
16,200
composite factor = 2
4 × 3
2 × 5
3 =
18,000
composite factor = 2 × 3
4 × 5
3 =
20,250
composite factor = 2
3 × 3
3 × 5
3 =
27,000
composite factor = 2
4 × 3
4 × 5
2 =
32,400
composite factor = 2
2 × 3
4 × 5
3 =
40,500
composite factor = 2
4 × 3
3 × 5
3 =
54,000
composite factor = 2
3 × 3
4 × 5
3 =
81,000
composite factor = 2
4 × 3
4 × 5
3 =
162,000
100 factors (divisors)
What times what is 162,000?
What number multiplied by what number equals 162,000?
All the combinations of any two natural numbers whose product equals 162,000.
1 × 162,000 = 162,000
2 × 81,000 = 162,000
3 × 54,000 = 162,000
4 × 40,500 = 162,000
5 × 32,400 = 162,000
6 × 27,000 = 162,000
8 × 20,250 = 162,000
9 × 18,000 = 162,000
10 × 16,200 = 162,000
12 × 13,500 = 162,000
15 × 10,800 = 162,000
16 × 10,125 = 162,000
18 × 9,000 = 162,000
20 × 8,100 = 162,000
24 × 6,750 = 162,000
25 × 6,480 = 162,000
27 × 6,000 = 162,000
30 × 5,400 = 162,000
36 × 4,500 = 162,000
40 × 4,050 = 162,000
45 × 3,600 = 162,000
48 × 3,375 = 162,000
50 × 3,240 = 162,000
54 × 3,000 = 162,000
60 × 2,700 = 162,000
72 × 2,250 = 162,000
75 × 2,160 = 162,000
80 × 2,025 = 162,000
81 × 2,000 = 162,000
90 × 1,800 = 162,000
100 × 1,620 = 162,000
108 × 1,500 = 162,000
120 × 1,350 = 162,000
125 × 1,296 = 162,000
135 × 1,200 = 162,000
144 × 1,125 = 162,000
150 × 1,080 = 162,000
162 × 1,000 = 162,000
180 × 900 = 162,000
200 × 810 = 162,000
216 × 750 = 162,000
225 × 720 = 162,000
240 × 675 = 162,000
250 × 648 = 162,000
270 × 600 = 162,000
300 × 540 = 162,000
324 × 500 = 162,000
360 × 450 = 162,000
375 × 432 = 162,000
400 × 405 = 162,000
50 unique multiplications The final answer:
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