To find all the divisors of the number 73,710:
- 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 73,710:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
73,710 = 2 × 34 × 5 × 7 × 13
73,710 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) × (4 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 2 × 5 × 2 × 2 × 2 = 80
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 73,710
- 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 =
13
composite factor = 2 × 7 =
14
composite factor = 3 × 5 =
15
composite factor = 2 × 3
2 =
18
composite factor = 3 × 7 =
21
composite factor = 2 × 13 =
26
composite factor = 3
3 =
27
composite factor = 2 × 3 × 5 =
30
composite factor = 5 × 7 =
35
composite factor = 3 × 13 =
39
composite factor = 2 × 3 × 7 =
42
composite factor = 3
2 × 5 =
45
composite factor = 2 × 3
3 =
54
composite factor = 3
2 × 7 =
63
composite factor = 5 × 13 =
65
composite factor = 2 × 5 × 7 =
70
composite factor = 2 × 3 × 13 =
78
composite factor = 3
4 =
81
composite factor = 2 × 3
2 × 5 =
90
composite factor = 7 × 13 =
91
composite factor = 3 × 5 × 7 =
105
composite factor = 3
2 × 13 =
117
composite factor = 2 × 3
2 × 7 =
126
composite factor = 2 × 5 × 13 =
130
composite factor = 3
3 × 5 =
135
composite factor = 2 × 3
4 =
162
composite factor = 2 × 7 × 13 =
182
composite factor = 3
3 × 7 =
189
composite factor = 3 × 5 × 13 =
195
composite factor = 2 × 3 × 5 × 7 =
210
composite factor = 2 × 3
2 × 13 =
234
composite factor = 2 × 3
3 × 5 =
270
This list continues below...
... This list continues from above
composite factor = 3 × 7 × 13 =
273
composite factor = 3
2 × 5 × 7 =
315
composite factor = 3
3 × 13 =
351
composite factor = 2 × 3
3 × 7 =
378
composite factor = 2 × 3 × 5 × 13 =
390
composite factor = 3
4 × 5 =
405
composite factor = 5 × 7 × 13 =
455
composite factor = 2 × 3 × 7 × 13 =
546
composite factor = 3
4 × 7 =
567
composite factor = 3
2 × 5 × 13 =
585
composite factor = 2 × 3
2 × 5 × 7 =
630
composite factor = 2 × 3
3 × 13 =
702
composite factor = 2 × 3
4 × 5 =
810
composite factor = 3
2 × 7 × 13 =
819
composite factor = 2 × 5 × 7 × 13 =
910
composite factor = 3
3 × 5 × 7 =
945
composite factor = 3
4 × 13 =
1,053
composite factor = 2 × 3
4 × 7 =
1,134
composite factor = 2 × 3
2 × 5 × 13 =
1,170
composite factor = 3 × 5 × 7 × 13 =
1,365
composite factor = 2 × 3
2 × 7 × 13 =
1,638
composite factor = 3
3 × 5 × 13 =
1,755
composite factor = 2 × 3
3 × 5 × 7 =
1,890
composite factor = 2 × 3
4 × 13 =
2,106
composite factor = 3
3 × 7 × 13 =
2,457
composite factor = 2 × 3 × 5 × 7 × 13 =
2,730
composite factor = 3
4 × 5 × 7 =
2,835
composite factor = 2 × 3
3 × 5 × 13 =
3,510
composite factor = 3
2 × 5 × 7 × 13 =
4,095
composite factor = 2 × 3
3 × 7 × 13 =
4,914
composite factor = 3
4 × 5 × 13 =
5,265
composite factor = 2 × 3
4 × 5 × 7 =
5,670
composite factor = 3
4 × 7 × 13 =
7,371
composite factor = 2 × 3
2 × 5 × 7 × 13 =
8,190
composite factor = 2 × 3
4 × 5 × 13 =
10,530
composite factor = 3
3 × 5 × 7 × 13 =
12,285
composite factor = 2 × 3
4 × 7 × 13 =
14,742
composite factor = 2 × 3
3 × 5 × 7 × 13 =
24,570
composite factor = 3
4 × 5 × 7 × 13 =
36,855
composite factor = 2 × 3
4 × 5 × 7 × 13 =
73,710
80 factors (divisors)
What times what is 73,710?
What number multiplied by what number equals 73,710?
All the combinations of any two natural numbers whose product equals 73,710.
1 × 73,710 = 73,710
2 × 36,855 = 73,710
3 × 24,570 = 73,710
5 × 14,742 = 73,710
6 × 12,285 = 73,710
7 × 10,530 = 73,710
9 × 8,190 = 73,710
10 × 7,371 = 73,710
13 × 5,670 = 73,710
14 × 5,265 = 73,710
15 × 4,914 = 73,710
18 × 4,095 = 73,710
21 × 3,510 = 73,710
26 × 2,835 = 73,710
27 × 2,730 = 73,710
30 × 2,457 = 73,710
35 × 2,106 = 73,710
39 × 1,890 = 73,710
42 × 1,755 = 73,710
45 × 1,638 = 73,710
54 × 1,365 = 73,710
63 × 1,170 = 73,710
65 × 1,134 = 73,710
70 × 1,053 = 73,710
78 × 945 = 73,710
81 × 910 = 73,710
90 × 819 = 73,710
91 × 810 = 73,710
105 × 702 = 73,710
117 × 630 = 73,710
126 × 585 = 73,710
130 × 567 = 73,710
135 × 546 = 73,710
162 × 455 = 73,710
182 × 405 = 73,710
189 × 390 = 73,710
195 × 378 = 73,710
210 × 351 = 73,710
234 × 315 = 73,710
270 × 273 = 73,710
40 unique multiplications The final answer:
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