To find all the divisors of the number 237,900:
- 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 237,900:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
237,900 = 22 × 3 × 52 × 13 × 61
237,900 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) × (2 + 1) × (1 + 1) × (1 + 1) = 3 × 2 × 3 × 2 × 2 = 72
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 237,900
- 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 × 5 =
10
composite factor = 2
2 × 3 =
12
prime factor =
13
composite factor = 3 × 5 =
15
composite factor = 2
2 × 5 =
20
composite factor = 5
2 =
25
composite factor = 2 × 13 =
26
composite factor = 2 × 3 × 5 =
30
composite factor = 3 × 13 =
39
composite factor = 2 × 5
2 =
50
composite factor = 2
2 × 13 =
52
composite factor = 2
2 × 3 × 5 =
60
prime factor =
61
composite factor = 5 × 13 =
65
composite factor = 3 × 5
2 =
75
composite factor = 2 × 3 × 13 =
78
composite factor = 2
2 × 5
2 =
100
composite factor = 2 × 61 =
122
composite factor = 2 × 5 × 13 =
130
composite factor = 2 × 3 × 5
2 =
150
composite factor = 2
2 × 3 × 13 =
156
composite factor = 3 × 61 =
183
composite factor = 3 × 5 × 13 =
195
composite factor = 2
2 × 61 =
244
composite factor = 2
2 × 5 × 13 =
260
composite factor = 2
2 × 3 × 5
2 =
300
composite factor = 5 × 61 =
305
composite factor = 5
2 × 13 =
325
composite factor = 2 × 3 × 61 =
366
composite factor = 2 × 3 × 5 × 13 =
390
This list continues below...
... This list continues from above
composite factor = 2 × 5 × 61 =
610
composite factor = 2 × 5
2 × 13 =
650
composite factor = 2
2 × 3 × 61 =
732
composite factor = 2
2 × 3 × 5 × 13 =
780
composite factor = 13 × 61 =
793
composite factor = 3 × 5 × 61 =
915
composite factor = 3 × 5
2 × 13 =
975
composite factor = 2
2 × 5 × 61 =
1,220
composite factor = 2
2 × 5
2 × 13 =
1,300
composite factor = 5
2 × 61 =
1,525
composite factor = 2 × 13 × 61 =
1,586
composite factor = 2 × 3 × 5 × 61 =
1,830
composite factor = 2 × 3 × 5
2 × 13 =
1,950
composite factor = 3 × 13 × 61 =
2,379
composite factor = 2 × 5
2 × 61 =
3,050
composite factor = 2
2 × 13 × 61 =
3,172
composite factor = 2
2 × 3 × 5 × 61 =
3,660
composite factor = 2
2 × 3 × 5
2 × 13 =
3,900
composite factor = 5 × 13 × 61 =
3,965
composite factor = 3 × 5
2 × 61 =
4,575
composite factor = 2 × 3 × 13 × 61 =
4,758
composite factor = 2
2 × 5
2 × 61 =
6,100
composite factor = 2 × 5 × 13 × 61 =
7,930
composite factor = 2 × 3 × 5
2 × 61 =
9,150
composite factor = 2
2 × 3 × 13 × 61 =
9,516
composite factor = 3 × 5 × 13 × 61 =
11,895
composite factor = 2
2 × 5 × 13 × 61 =
15,860
composite factor = 2
2 × 3 × 5
2 × 61 =
18,300
composite factor = 5
2 × 13 × 61 =
19,825
composite factor = 2 × 3 × 5 × 13 × 61 =
23,790
composite factor = 2 × 5
2 × 13 × 61 =
39,650
composite factor = 2
2 × 3 × 5 × 13 × 61 =
47,580
composite factor = 3 × 5
2 × 13 × 61 =
59,475
composite factor = 2
2 × 5
2 × 13 × 61 =
79,300
composite factor = 2 × 3 × 5
2 × 13 × 61 =
118,950
composite factor = 2
2 × 3 × 5
2 × 13 × 61 =
237,900
72 factors (divisors)
What times what is 237,900?
What number multiplied by what number equals 237,900?
All the combinations of any two natural numbers whose product equals 237,900.
1 × 237,900 = 237,900
2 × 118,950 = 237,900
3 × 79,300 = 237,900
4 × 59,475 = 237,900
5 × 47,580 = 237,900
6 × 39,650 = 237,900
10 × 23,790 = 237,900
12 × 19,825 = 237,900
13 × 18,300 = 237,900
15 × 15,860 = 237,900
20 × 11,895 = 237,900
25 × 9,516 = 237,900
26 × 9,150 = 237,900
30 × 7,930 = 237,900
39 × 6,100 = 237,900
50 × 4,758 = 237,900
52 × 4,575 = 237,900
60 × 3,965 = 237,900
61 × 3,900 = 237,900
65 × 3,660 = 237,900
75 × 3,172 = 237,900
78 × 3,050 = 237,900
100 × 2,379 = 237,900
122 × 1,950 = 237,900
130 × 1,830 = 237,900
150 × 1,586 = 237,900
156 × 1,525 = 237,900
183 × 1,300 = 237,900
195 × 1,220 = 237,900
244 × 975 = 237,900
260 × 915 = 237,900
300 × 793 = 237,900
305 × 780 = 237,900
325 × 732 = 237,900
366 × 650 = 237,900
390 × 610 = 237,900
36 unique multiplications The final answer:
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