To find all the divisors of the number 793,000:
- 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 793,000:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
793,000 = 23 × 53 × 13 × 61
793,000 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 = (3 + 1) × (3 + 1) × (1 + 1) × (1 + 1) = 4 × 4 × 2 × 2 = 64
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 793,000
- 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
composite factor = 2
2 =
4
prime factor =
5
composite factor = 2
3 =
8
composite factor = 2 × 5 =
10
prime factor =
13
composite factor = 2
2 × 5 =
20
composite factor = 5
2 =
25
composite factor = 2 × 13 =
26
composite factor = 2
3 × 5 =
40
composite factor = 2 × 5
2 =
50
composite factor = 2
2 × 13 =
52
prime factor =
61
composite factor = 5 × 13 =
65
composite factor = 2
2 × 5
2 =
100
composite factor = 2
3 × 13 =
104
composite factor = 2 × 61 =
122
composite factor = 5
3 =
125
composite factor = 2 × 5 × 13 =
130
composite factor = 2
3 × 5
2 =
200
composite factor = 2
2 × 61 =
244
composite factor = 2 × 5
3 =
250
composite factor = 2
2 × 5 × 13 =
260
composite factor = 5 × 61 =
305
composite factor = 5
2 × 13 =
325
composite factor = 2
3 × 61 =
488
composite factor = 2
2 × 5
3 =
500
composite factor = 2
3 × 5 × 13 =
520
composite factor = 2 × 5 × 61 =
610
composite factor = 2 × 5
2 × 13 =
650
composite factor = 13 × 61 =
793
This list continues below...
... This list continues from above
composite factor = 2
3 × 5
3 =
1,000
composite factor = 2
2 × 5 × 61 =
1,220
composite factor = 2
2 × 5
2 × 13 =
1,300
composite factor = 5
2 × 61 =
1,525
composite factor = 2 × 13 × 61 =
1,586
composite factor = 5
3 × 13 =
1,625
composite factor = 2
3 × 5 × 61 =
2,440
composite factor = 2
3 × 5
2 × 13 =
2,600
composite factor = 2 × 5
2 × 61 =
3,050
composite factor = 2
2 × 13 × 61 =
3,172
composite factor = 2 × 5
3 × 13 =
3,250
composite factor = 5 × 13 × 61 =
3,965
composite factor = 2
2 × 5
2 × 61 =
6,100
composite factor = 2
3 × 13 × 61 =
6,344
composite factor = 2
2 × 5
3 × 13 =
6,500
composite factor = 5
3 × 61 =
7,625
composite factor = 2 × 5 × 13 × 61 =
7,930
composite factor = 2
3 × 5
2 × 61 =
12,200
composite factor = 2
3 × 5
3 × 13 =
13,000
composite factor = 2 × 5
3 × 61 =
15,250
composite factor = 2
2 × 5 × 13 × 61 =
15,860
composite factor = 5
2 × 13 × 61 =
19,825
composite factor = 2
2 × 5
3 × 61 =
30,500
composite factor = 2
3 × 5 × 13 × 61 =
31,720
composite factor = 2 × 5
2 × 13 × 61 =
39,650
composite factor = 2
3 × 5
3 × 61 =
61,000
composite factor = 2
2 × 5
2 × 13 × 61 =
79,300
composite factor = 5
3 × 13 × 61 =
99,125
composite factor = 2
3 × 5
2 × 13 × 61 =
158,600
composite factor = 2 × 5
3 × 13 × 61 =
198,250
composite factor = 2
2 × 5
3 × 13 × 61 =
396,500
composite factor = 2
3 × 5
3 × 13 × 61 =
793,000
64 factors (divisors)
What times what is 793,000?
What number multiplied by what number equals 793,000?
All the combinations of any two natural numbers whose product equals 793,000.
1 × 793,000 = 793,000
2 × 396,500 = 793,000
4 × 198,250 = 793,000
5 × 158,600 = 793,000
8 × 99,125 = 793,000
10 × 79,300 = 793,000
13 × 61,000 = 793,000
20 × 39,650 = 793,000
25 × 31,720 = 793,000
26 × 30,500 = 793,000
40 × 19,825 = 793,000
50 × 15,860 = 793,000
52 × 15,250 = 793,000
61 × 13,000 = 793,000
65 × 12,200 = 793,000
100 × 7,930 = 793,000
104 × 7,625 = 793,000
122 × 6,500 = 793,000
125 × 6,344 = 793,000
130 × 6,100 = 793,000
200 × 3,965 = 793,000
244 × 3,250 = 793,000
250 × 3,172 = 793,000
260 × 3,050 = 793,000
305 × 2,600 = 793,000
325 × 2,440 = 793,000
488 × 1,625 = 793,000
500 × 1,586 = 793,000
520 × 1,525 = 793,000
610 × 1,300 = 793,000
650 × 1,220 = 793,000
793 × 1,000 = 793,000
32 unique multiplications The final answer:
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