To find all the divisors of the number 33,300:
- 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 33,300:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
33,300 = 22 × 32 × 52 × 37
33,300 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) × (2 + 1) × (2 + 1) × (1 + 1) = 3 × 3 × 3 × 2 = 54
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 33,300
- 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 = 3
2 =
9
composite factor = 2 × 5 =
10
composite factor = 2
2 × 3 =
12
composite factor = 3 × 5 =
15
composite factor = 2 × 3
2 =
18
composite factor = 2
2 × 5 =
20
composite factor = 5
2 =
25
composite factor = 2 × 3 × 5 =
30
composite factor = 2
2 × 3
2 =
36
prime factor =
37
composite factor = 3
2 × 5 =
45
composite factor = 2 × 5
2 =
50
composite factor = 2
2 × 3 × 5 =
60
composite factor = 2 × 37 =
74
composite factor = 3 × 5
2 =
75
composite factor = 2 × 3
2 × 5 =
90
composite factor = 2
2 × 5
2 =
100
composite factor = 3 × 37 =
111
composite factor = 2
2 × 37 =
148
composite factor = 2 × 3 × 5
2 =
150
composite factor = 2
2 × 3
2 × 5 =
180
This list continues below...
... This list continues from above
composite factor = 5 × 37 =
185
composite factor = 2 × 3 × 37 =
222
composite factor = 3
2 × 5
2 =
225
composite factor = 2
2 × 3 × 5
2 =
300
composite factor = 3
2 × 37 =
333
composite factor = 2 × 5 × 37 =
370
composite factor = 2
2 × 3 × 37 =
444
composite factor = 2 × 3
2 × 5
2 =
450
composite factor = 3 × 5 × 37 =
555
composite factor = 2 × 3
2 × 37 =
666
composite factor = 2
2 × 5 × 37 =
740
composite factor = 2
2 × 3
2 × 5
2 =
900
composite factor = 5
2 × 37 =
925
composite factor = 2 × 3 × 5 × 37 =
1,110
composite factor = 2
2 × 3
2 × 37 =
1,332
composite factor = 3
2 × 5 × 37 =
1,665
composite factor = 2 × 5
2 × 37 =
1,850
composite factor = 2
2 × 3 × 5 × 37 =
2,220
composite factor = 3 × 5
2 × 37 =
2,775
composite factor = 2 × 3
2 × 5 × 37 =
3,330
composite factor = 2
2 × 5
2 × 37 =
3,700
composite factor = 2 × 3 × 5
2 × 37 =
5,550
composite factor = 2
2 × 3
2 × 5 × 37 =
6,660
composite factor = 3
2 × 5
2 × 37 =
8,325
composite factor = 2
2 × 3 × 5
2 × 37 =
11,100
composite factor = 2 × 3
2 × 5
2 × 37 =
16,650
composite factor = 2
2 × 3
2 × 5
2 × 37 =
33,300
54 factors (divisors)
What times what is 33,300?
What number multiplied by what number equals 33,300?
All the combinations of any two natural numbers whose product equals 33,300.
1 × 33,300 = 33,300
2 × 16,650 = 33,300
3 × 11,100 = 33,300
4 × 8,325 = 33,300
5 × 6,660 = 33,300
6 × 5,550 = 33,300
9 × 3,700 = 33,300
10 × 3,330 = 33,300
12 × 2,775 = 33,300
15 × 2,220 = 33,300
18 × 1,850 = 33,300
20 × 1,665 = 33,300
25 × 1,332 = 33,300
30 × 1,110 = 33,300
36 × 925 = 33,300
37 × 900 = 33,300
45 × 740 = 33,300
50 × 666 = 33,300
60 × 555 = 33,300
74 × 450 = 33,300
75 × 444 = 33,300
90 × 370 = 33,300
100 × 333 = 33,300
111 × 300 = 33,300
148 × 225 = 33,300
150 × 222 = 33,300
180 × 185 = 33,300
27 unique multiplications The final answer:
(scroll down)