To find all the divisors of the number 84,360:
- 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 84,360:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
84,360 = 23 × 3 × 5 × 19 × 37
84,360 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) × (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 4 × 2 × 2 × 2 × 2 = 64
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 84,360
- 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 = 2 × 5 =
10
composite factor = 2
2 × 3 =
12
composite factor = 3 × 5 =
15
prime factor =
19
composite factor = 2
2 × 5 =
20
composite factor = 2
3 × 3 =
24
composite factor = 2 × 3 × 5 =
30
prime factor =
37
composite factor = 2 × 19 =
38
composite factor = 2
3 × 5 =
40
composite factor = 3 × 19 =
57
composite factor = 2
2 × 3 × 5 =
60
composite factor = 2 × 37 =
74
composite factor = 2
2 × 19 =
76
composite factor = 5 × 19 =
95
composite factor = 3 × 37 =
111
composite factor = 2 × 3 × 19 =
114
composite factor = 2
3 × 3 × 5 =
120
composite factor = 2
2 × 37 =
148
composite factor = 2
3 × 19 =
152
composite factor = 5 × 37 =
185
composite factor = 2 × 5 × 19 =
190
composite factor = 2 × 3 × 37 =
222
composite factor = 2
2 × 3 × 19 =
228
composite factor = 3 × 5 × 19 =
285
This list continues below...
... This list continues from above
composite factor = 2
3 × 37 =
296
composite factor = 2 × 5 × 37 =
370
composite factor = 2
2 × 5 × 19 =
380
composite factor = 2
2 × 3 × 37 =
444
composite factor = 2
3 × 3 × 19 =
456
composite factor = 3 × 5 × 37 =
555
composite factor = 2 × 3 × 5 × 19 =
570
composite factor = 19 × 37 =
703
composite factor = 2
2 × 5 × 37 =
740
composite factor = 2
3 × 5 × 19 =
760
composite factor = 2
3 × 3 × 37 =
888
composite factor = 2 × 3 × 5 × 37 =
1,110
composite factor = 2
2 × 3 × 5 × 19 =
1,140
composite factor = 2 × 19 × 37 =
1,406
composite factor = 2
3 × 5 × 37 =
1,480
composite factor = 3 × 19 × 37 =
2,109
composite factor = 2
2 × 3 × 5 × 37 =
2,220
composite factor = 2
3 × 3 × 5 × 19 =
2,280
composite factor = 2
2 × 19 × 37 =
2,812
composite factor = 5 × 19 × 37 =
3,515
composite factor = 2 × 3 × 19 × 37 =
4,218
composite factor = 2
3 × 3 × 5 × 37 =
4,440
composite factor = 2
3 × 19 × 37 =
5,624
composite factor = 2 × 5 × 19 × 37 =
7,030
composite factor = 2
2 × 3 × 19 × 37 =
8,436
composite factor = 3 × 5 × 19 × 37 =
10,545
composite factor = 2
2 × 5 × 19 × 37 =
14,060
composite factor = 2
3 × 3 × 19 × 37 =
16,872
composite factor = 2 × 3 × 5 × 19 × 37 =
21,090
composite factor = 2
3 × 5 × 19 × 37 =
28,120
composite factor = 2
2 × 3 × 5 × 19 × 37 =
42,180
composite factor = 2
3 × 3 × 5 × 19 × 37 =
84,360
64 factors (divisors)
What times what is 84,360?
What number multiplied by what number equals 84,360?
All the combinations of any two natural numbers whose product equals 84,360.
1 × 84,360 = 84,360
2 × 42,180 = 84,360
3 × 28,120 = 84,360
4 × 21,090 = 84,360
5 × 16,872 = 84,360
6 × 14,060 = 84,360
8 × 10,545 = 84,360
10 × 8,436 = 84,360
12 × 7,030 = 84,360
15 × 5,624 = 84,360
19 × 4,440 = 84,360
20 × 4,218 = 84,360
24 × 3,515 = 84,360
30 × 2,812 = 84,360
37 × 2,280 = 84,360
38 × 2,220 = 84,360
40 × 2,109 = 84,360
57 × 1,480 = 84,360
60 × 1,406 = 84,360
74 × 1,140 = 84,360
76 × 1,110 = 84,360
95 × 888 = 84,360
111 × 760 = 84,360
114 × 740 = 84,360
120 × 703 = 84,360
148 × 570 = 84,360
152 × 555 = 84,360
185 × 456 = 84,360
190 × 444 = 84,360
222 × 380 = 84,360
228 × 370 = 84,360
285 × 296 = 84,360
32 unique multiplications The final answer:
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