To find all the divisors of the number 843,700:
- 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 843,700:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
843,700 = 22 × 52 × 11 × 13 × 59
843,700 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) × (2 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 3 × 3 × 2 × 2 × 2 = 72
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 843,700
- 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 × 5 =
10
prime factor =
11
prime factor =
13
composite factor = 2
2 × 5 =
20
composite factor = 2 × 11 =
22
composite factor = 5
2 =
25
composite factor = 2 × 13 =
26
composite factor = 2
2 × 11 =
44
composite factor = 2 × 5
2 =
50
composite factor = 2
2 × 13 =
52
composite factor = 5 × 11 =
55
prime factor =
59
composite factor = 5 × 13 =
65
composite factor = 2
2 × 5
2 =
100
composite factor = 2 × 5 × 11 =
110
composite factor = 2 × 59 =
118
composite factor = 2 × 5 × 13 =
130
composite factor = 11 × 13 =
143
composite factor = 2
2 × 5 × 11 =
220
composite factor = 2
2 × 59 =
236
composite factor = 2
2 × 5 × 13 =
260
composite factor = 5
2 × 11 =
275
composite factor = 2 × 11 × 13 =
286
composite factor = 5 × 59 =
295
composite factor = 5
2 × 13 =
325
composite factor = 2 × 5
2 × 11 =
550
composite factor = 2
2 × 11 × 13 =
572
composite factor = 2 × 5 × 59 =
590
composite factor = 11 × 59 =
649
composite factor = 2 × 5
2 × 13 =
650
composite factor = 5 × 11 × 13 =
715
composite factor = 13 × 59 =
767
This list continues below...
... This list continues from above
composite factor = 2
2 × 5
2 × 11 =
1,100
composite factor = 2
2 × 5 × 59 =
1,180
composite factor = 2 × 11 × 59 =
1,298
composite factor = 2
2 × 5
2 × 13 =
1,300
composite factor = 2 × 5 × 11 × 13 =
1,430
composite factor = 5
2 × 59 =
1,475
composite factor = 2 × 13 × 59 =
1,534
composite factor = 2
2 × 11 × 59 =
2,596
composite factor = 2
2 × 5 × 11 × 13 =
2,860
composite factor = 2 × 5
2 × 59 =
2,950
composite factor = 2
2 × 13 × 59 =
3,068
composite factor = 5 × 11 × 59 =
3,245
composite factor = 5
2 × 11 × 13 =
3,575
composite factor = 5 × 13 × 59 =
3,835
composite factor = 2
2 × 5
2 × 59 =
5,900
composite factor = 2 × 5 × 11 × 59 =
6,490
composite factor = 2 × 5
2 × 11 × 13 =
7,150
composite factor = 2 × 5 × 13 × 59 =
7,670
composite factor = 11 × 13 × 59 =
8,437
composite factor = 2
2 × 5 × 11 × 59 =
12,980
composite factor = 2
2 × 5
2 × 11 × 13 =
14,300
composite factor = 2
2 × 5 × 13 × 59 =
15,340
composite factor = 5
2 × 11 × 59 =
16,225
composite factor = 2 × 11 × 13 × 59 =
16,874
composite factor = 5
2 × 13 × 59 =
19,175
composite factor = 2 × 5
2 × 11 × 59 =
32,450
composite factor = 2
2 × 11 × 13 × 59 =
33,748
composite factor = 2 × 5
2 × 13 × 59 =
38,350
composite factor = 5 × 11 × 13 × 59 =
42,185
composite factor = 2
2 × 5
2 × 11 × 59 =
64,900
composite factor = 2
2 × 5
2 × 13 × 59 =
76,700
composite factor = 2 × 5 × 11 × 13 × 59 =
84,370
composite factor = 2
2 × 5 × 11 × 13 × 59 =
168,740
composite factor = 5
2 × 11 × 13 × 59 =
210,925
composite factor = 2 × 5
2 × 11 × 13 × 59 =
421,850
composite factor = 2
2 × 5
2 × 11 × 13 × 59 =
843,700
72 factors (divisors)
What times what is 843,700?
What number multiplied by what number equals 843,700?
All the combinations of any two natural numbers whose product equals 843,700.
1 × 843,700 = 843,700
2 × 421,850 = 843,700
4 × 210,925 = 843,700
5 × 168,740 = 843,700
10 × 84,370 = 843,700
11 × 76,700 = 843,700
13 × 64,900 = 843,700
20 × 42,185 = 843,700
22 × 38,350 = 843,700
25 × 33,748 = 843,700
26 × 32,450 = 843,700
44 × 19,175 = 843,700
50 × 16,874 = 843,700
52 × 16,225 = 843,700
55 × 15,340 = 843,700
59 × 14,300 = 843,700
65 × 12,980 = 843,700
100 × 8,437 = 843,700
110 × 7,670 = 843,700
118 × 7,150 = 843,700
130 × 6,490 = 843,700
143 × 5,900 = 843,700
220 × 3,835 = 843,700
236 × 3,575 = 843,700
260 × 3,245 = 843,700
275 × 3,068 = 843,700
286 × 2,950 = 843,700
295 × 2,860 = 843,700
325 × 2,596 = 843,700
550 × 1,534 = 843,700
572 × 1,475 = 843,700
590 × 1,430 = 843,700
649 × 1,300 = 843,700
650 × 1,298 = 843,700
715 × 1,180 = 843,700
767 × 1,100 = 843,700
36 unique multiplications The final answer:
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