To find all the divisors of the number 83,600:
- 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 83,600:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
83,600 = 24 × 52 × 11 × 19
83,600 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) × (2 + 1) × (1 + 1) × (1 + 1) = 5 × 3 × 2 × 2 = 60
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 83,600
- 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
prime factor =
5
composite factor = 2
3 =
8
composite factor = 2 × 5 =
10
prime factor =
11
composite factor = 2
4 =
16
prime factor =
19
composite factor = 2
2 × 5 =
20
composite factor = 2 × 11 =
22
composite factor = 5
2 =
25
composite factor = 2 × 19 =
38
composite factor = 2
3 × 5 =
40
composite factor = 2
2 × 11 =
44
composite factor = 2 × 5
2 =
50
composite factor = 5 × 11 =
55
composite factor = 2
2 × 19 =
76
composite factor = 2
4 × 5 =
80
composite factor = 2
3 × 11 =
88
composite factor = 5 × 19 =
95
composite factor = 2
2 × 5
2 =
100
composite factor = 2 × 5 × 11 =
110
composite factor = 2
3 × 19 =
152
composite factor = 2
4 × 11 =
176
composite factor = 2 × 5 × 19 =
190
composite factor = 2
3 × 5
2 =
200
composite factor = 11 × 19 =
209
composite factor = 2
2 × 5 × 11 =
220
composite factor = 5
2 × 11 =
275
This list continues below...
... This list continues from above
composite factor = 2
4 × 19 =
304
composite factor = 2
2 × 5 × 19 =
380
composite factor = 2
4 × 5
2 =
400
composite factor = 2 × 11 × 19 =
418
composite factor = 2
3 × 5 × 11 =
440
composite factor = 5
2 × 19 =
475
composite factor = 2 × 5
2 × 11 =
550
composite factor = 2
3 × 5 × 19 =
760
composite factor = 2
2 × 11 × 19 =
836
composite factor = 2
4 × 5 × 11 =
880
composite factor = 2 × 5
2 × 19 =
950
composite factor = 5 × 11 × 19 =
1,045
composite factor = 2
2 × 5
2 × 11 =
1,100
composite factor = 2
4 × 5 × 19 =
1,520
composite factor = 2
3 × 11 × 19 =
1,672
composite factor = 2
2 × 5
2 × 19 =
1,900
composite factor = 2 × 5 × 11 × 19 =
2,090
composite factor = 2
3 × 5
2 × 11 =
2,200
composite factor = 2
4 × 11 × 19 =
3,344
composite factor = 2
3 × 5
2 × 19 =
3,800
composite factor = 2
2 × 5 × 11 × 19 =
4,180
composite factor = 2
4 × 5
2 × 11 =
4,400
composite factor = 5
2 × 11 × 19 =
5,225
composite factor = 2
4 × 5
2 × 19 =
7,600
composite factor = 2
3 × 5 × 11 × 19 =
8,360
composite factor = 2 × 5
2 × 11 × 19 =
10,450
composite factor = 2
4 × 5 × 11 × 19 =
16,720
composite factor = 2
2 × 5
2 × 11 × 19 =
20,900
composite factor = 2
3 × 5
2 × 11 × 19 =
41,800
composite factor = 2
4 × 5
2 × 11 × 19 =
83,600
60 factors (divisors)
What times what is 83,600?
What number multiplied by what number equals 83,600?
All the combinations of any two natural numbers whose product equals 83,600.
1 × 83,600 = 83,600
2 × 41,800 = 83,600
4 × 20,900 = 83,600
5 × 16,720 = 83,600
8 × 10,450 = 83,600
10 × 8,360 = 83,600
11 × 7,600 = 83,600
16 × 5,225 = 83,600
19 × 4,400 = 83,600
20 × 4,180 = 83,600
22 × 3,800 = 83,600
25 × 3,344 = 83,600
38 × 2,200 = 83,600
40 × 2,090 = 83,600
44 × 1,900 = 83,600
50 × 1,672 = 83,600
55 × 1,520 = 83,600
76 × 1,100 = 83,600
80 × 1,045 = 83,600
88 × 950 = 83,600
95 × 880 = 83,600
100 × 836 = 83,600
110 × 760 = 83,600
152 × 550 = 83,600
176 × 475 = 83,600
190 × 440 = 83,600
200 × 418 = 83,600
209 × 400 = 83,600
220 × 380 = 83,600
275 × 304 = 83,600
30 unique multiplications The final answer:
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