To find all the divisors of the number 67,340:
- 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 67,340:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
67,340 = 22 × 5 × 7 × 13 × 37
67,340 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 67,340
- 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
prime factor =
7
composite factor = 2 × 5 =
10
prime factor =
13
composite factor = 2 × 7 =
14
composite factor = 2
2 × 5 =
20
composite factor = 2 × 13 =
26
composite factor = 2
2 × 7 =
28
composite factor = 5 × 7 =
35
prime factor =
37
composite factor = 2
2 × 13 =
52
composite factor = 5 × 13 =
65
composite factor = 2 × 5 × 7 =
70
composite factor = 2 × 37 =
74
composite factor = 7 × 13 =
91
composite factor = 2 × 5 × 13 =
130
composite factor = 2
2 × 5 × 7 =
140
composite factor = 2
2 × 37 =
148
composite factor = 2 × 7 × 13 =
182
composite factor = 5 × 37 =
185
composite factor = 7 × 37 =
259
This list continues below...
... This list continues from above
composite factor = 2
2 × 5 × 13 =
260
composite factor = 2
2 × 7 × 13 =
364
composite factor = 2 × 5 × 37 =
370
composite factor = 5 × 7 × 13 =
455
composite factor = 13 × 37 =
481
composite factor = 2 × 7 × 37 =
518
composite factor = 2
2 × 5 × 37 =
740
composite factor = 2 × 5 × 7 × 13 =
910
composite factor = 2 × 13 × 37 =
962
composite factor = 2
2 × 7 × 37 =
1,036
composite factor = 5 × 7 × 37 =
1,295
composite factor = 2
2 × 5 × 7 × 13 =
1,820
composite factor = 2
2 × 13 × 37 =
1,924
composite factor = 5 × 13 × 37 =
2,405
composite factor = 2 × 5 × 7 × 37 =
2,590
composite factor = 7 × 13 × 37 =
3,367
composite factor = 2 × 5 × 13 × 37 =
4,810
composite factor = 2
2 × 5 × 7 × 37 =
5,180
composite factor = 2 × 7 × 13 × 37 =
6,734
composite factor = 2
2 × 5 × 13 × 37 =
9,620
composite factor = 2
2 × 7 × 13 × 37 =
13,468
composite factor = 5 × 7 × 13 × 37 =
16,835
composite factor = 2 × 5 × 7 × 13 × 37 =
33,670
composite factor = 2
2 × 5 × 7 × 13 × 37 =
67,340
48 factors (divisors)
What times what is 67,340?
What number multiplied by what number equals 67,340?
All the combinations of any two natural numbers whose product equals 67,340.
1 × 67,340 = 67,340
2 × 33,670 = 67,340
4 × 16,835 = 67,340
5 × 13,468 = 67,340
7 × 9,620 = 67,340
10 × 6,734 = 67,340
13 × 5,180 = 67,340
14 × 4,810 = 67,340
20 × 3,367 = 67,340
26 × 2,590 = 67,340
28 × 2,405 = 67,340
35 × 1,924 = 67,340
37 × 1,820 = 67,340
52 × 1,295 = 67,340
65 × 1,036 = 67,340
70 × 962 = 67,340
74 × 910 = 67,340
91 × 740 = 67,340
130 × 518 = 67,340
140 × 481 = 67,340
148 × 455 = 67,340
182 × 370 = 67,340
185 × 364 = 67,340
259 × 260 = 67,340
24 unique multiplications The final answer:
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