To find all the divisors of the number 76,230:
- 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 76,230:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
76,230 = 2 × 32 × 5 × 7 × 112
76,230 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 = (1 + 1) × (2 + 1) × (1 + 1) × (1 + 1) × (2 + 1) = 2 × 3 × 2 × 2 × 3 = 72
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 76,230
- 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
prime factor =
5
composite factor = 2 × 3 =
6
prime factor =
7
composite factor = 3
2 =
9
composite factor = 2 × 5 =
10
prime factor =
11
composite factor = 2 × 7 =
14
composite factor = 3 × 5 =
15
composite factor = 2 × 3
2 =
18
composite factor = 3 × 7 =
21
composite factor = 2 × 11 =
22
composite factor = 2 × 3 × 5 =
30
composite factor = 3 × 11 =
33
composite factor = 5 × 7 =
35
composite factor = 2 × 3 × 7 =
42
composite factor = 3
2 × 5 =
45
composite factor = 5 × 11 =
55
composite factor = 3
2 × 7 =
63
composite factor = 2 × 3 × 11 =
66
composite factor = 2 × 5 × 7 =
70
composite factor = 7 × 11 =
77
composite factor = 2 × 3
2 × 5 =
90
composite factor = 3
2 × 11 =
99
composite factor = 3 × 5 × 7 =
105
composite factor = 2 × 5 × 11 =
110
composite factor = 11
2 =
121
composite factor = 2 × 3
2 × 7 =
126
composite factor = 2 × 7 × 11 =
154
composite factor = 3 × 5 × 11 =
165
composite factor = 2 × 3
2 × 11 =
198
composite factor = 2 × 3 × 5 × 7 =
210
composite factor = 3 × 7 × 11 =
231
composite factor = 2 × 11
2 =
242
This list continues below...
... This list continues from above
composite factor = 3
2 × 5 × 7 =
315
composite factor = 2 × 3 × 5 × 11 =
330
composite factor = 3 × 11
2 =
363
composite factor = 5 × 7 × 11 =
385
composite factor = 2 × 3 × 7 × 11 =
462
composite factor = 3
2 × 5 × 11 =
495
composite factor = 5 × 11
2 =
605
composite factor = 2 × 3
2 × 5 × 7 =
630
composite factor = 3
2 × 7 × 11 =
693
composite factor = 2 × 3 × 11
2 =
726
composite factor = 2 × 5 × 7 × 11 =
770
composite factor = 7 × 11
2 =
847
composite factor = 2 × 3
2 × 5 × 11 =
990
composite factor = 3
2 × 11
2 =
1,089
composite factor = 3 × 5 × 7 × 11 =
1,155
composite factor = 2 × 5 × 11
2 =
1,210
composite factor = 2 × 3
2 × 7 × 11 =
1,386
composite factor = 2 × 7 × 11
2 =
1,694
composite factor = 3 × 5 × 11
2 =
1,815
composite factor = 2 × 3
2 × 11
2 =
2,178
composite factor = 2 × 3 × 5 × 7 × 11 =
2,310
composite factor = 3 × 7 × 11
2 =
2,541
composite factor = 3
2 × 5 × 7 × 11 =
3,465
composite factor = 2 × 3 × 5 × 11
2 =
3,630
composite factor = 5 × 7 × 11
2 =
4,235
composite factor = 2 × 3 × 7 × 11
2 =
5,082
composite factor = 3
2 × 5 × 11
2 =
5,445
composite factor = 2 × 3
2 × 5 × 7 × 11 =
6,930
composite factor = 3
2 × 7 × 11
2 =
7,623
composite factor = 2 × 5 × 7 × 11
2 =
8,470
composite factor = 2 × 3
2 × 5 × 11
2 =
10,890
composite factor = 3 × 5 × 7 × 11
2 =
12,705
composite factor = 2 × 3
2 × 7 × 11
2 =
15,246
composite factor = 2 × 3 × 5 × 7 × 11
2 =
25,410
composite factor = 3
2 × 5 × 7 × 11
2 =
38,115
composite factor = 2 × 3
2 × 5 × 7 × 11
2 =
76,230
72 factors (divisors)
What times what is 76,230?
What number multiplied by what number equals 76,230?
All the combinations of any two natural numbers whose product equals 76,230.
1 × 76,230 = 76,230
2 × 38,115 = 76,230
3 × 25,410 = 76,230
5 × 15,246 = 76,230
6 × 12,705 = 76,230
7 × 10,890 = 76,230
9 × 8,470 = 76,230
10 × 7,623 = 76,230
11 × 6,930 = 76,230
14 × 5,445 = 76,230
15 × 5,082 = 76,230
18 × 4,235 = 76,230
21 × 3,630 = 76,230
22 × 3,465 = 76,230
30 × 2,541 = 76,230
33 × 2,310 = 76,230
35 × 2,178 = 76,230
42 × 1,815 = 76,230
45 × 1,694 = 76,230
55 × 1,386 = 76,230
63 × 1,210 = 76,230
66 × 1,155 = 76,230
70 × 1,089 = 76,230
77 × 990 = 76,230
90 × 847 = 76,230
99 × 770 = 76,230
105 × 726 = 76,230
110 × 693 = 76,230
121 × 630 = 76,230
126 × 605 = 76,230
154 × 495 = 76,230
165 × 462 = 76,230
198 × 385 = 76,230
210 × 363 = 76,230
231 × 330 = 76,230
242 × 315 = 76,230
36 unique multiplications The final answer:
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