To find all the divisors of the number 41,760:
- 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 41,760:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
41,760 = 25 × 32 × 5 × 29
41,760 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 = (5 + 1) × (2 + 1) × (1 + 1) × (1 + 1) = 6 × 3 × 2 × 2 = 72
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 41,760
- 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 = 3
2 =
9
composite factor = 2 × 5 =
10
composite factor = 2
2 × 3 =
12
composite factor = 3 × 5 =
15
composite factor = 2
4 =
16
composite factor = 2 × 3
2 =
18
composite factor = 2
2 × 5 =
20
composite factor = 2
3 × 3 =
24
prime factor =
29
composite factor = 2 × 3 × 5 =
30
composite factor = 2
5 =
32
composite factor = 2
2 × 3
2 =
36
composite factor = 2
3 × 5 =
40
composite factor = 3
2 × 5 =
45
composite factor = 2
4 × 3 =
48
composite factor = 2 × 29 =
58
composite factor = 2
2 × 3 × 5 =
60
composite factor = 2
3 × 3
2 =
72
composite factor = 2
4 × 5 =
80
composite factor = 3 × 29 =
87
composite factor = 2 × 3
2 × 5 =
90
composite factor = 2
5 × 3 =
96
composite factor = 2
2 × 29 =
116
composite factor = 2
3 × 3 × 5 =
120
composite factor = 2
4 × 3
2 =
144
composite factor = 5 × 29 =
145
composite factor = 2
5 × 5 =
160
composite factor = 2 × 3 × 29 =
174
composite factor = 2
2 × 3
2 × 5 =
180
This list continues below...
... This list continues from above
composite factor = 2
3 × 29 =
232
composite factor = 2
4 × 3 × 5 =
240
composite factor = 3
2 × 29 =
261
composite factor = 2
5 × 3
2 =
288
composite factor = 2 × 5 × 29 =
290
composite factor = 2
2 × 3 × 29 =
348
composite factor = 2
3 × 3
2 × 5 =
360
composite factor = 3 × 5 × 29 =
435
composite factor = 2
4 × 29 =
464
composite factor = 2
5 × 3 × 5 =
480
composite factor = 2 × 3
2 × 29 =
522
composite factor = 2
2 × 5 × 29 =
580
composite factor = 2
3 × 3 × 29 =
696
composite factor = 2
4 × 3
2 × 5 =
720
composite factor = 2 × 3 × 5 × 29 =
870
composite factor = 2
5 × 29 =
928
composite factor = 2
2 × 3
2 × 29 =
1,044
composite factor = 2
3 × 5 × 29 =
1,160
composite factor = 3
2 × 5 × 29 =
1,305
composite factor = 2
4 × 3 × 29 =
1,392
composite factor = 2
5 × 3
2 × 5 =
1,440
composite factor = 2
2 × 3 × 5 × 29 =
1,740
composite factor = 2
3 × 3
2 × 29 =
2,088
composite factor = 2
4 × 5 × 29 =
2,320
composite factor = 2 × 3
2 × 5 × 29 =
2,610
composite factor = 2
5 × 3 × 29 =
2,784
composite factor = 2
3 × 3 × 5 × 29 =
3,480
composite factor = 2
4 × 3
2 × 29 =
4,176
composite factor = 2
5 × 5 × 29 =
4,640
composite factor = 2
2 × 3
2 × 5 × 29 =
5,220
composite factor = 2
4 × 3 × 5 × 29 =
6,960
composite factor = 2
5 × 3
2 × 29 =
8,352
composite factor = 2
3 × 3
2 × 5 × 29 =
10,440
composite factor = 2
5 × 3 × 5 × 29 =
13,920
composite factor = 2
4 × 3
2 × 5 × 29 =
20,880
composite factor = 2
5 × 3
2 × 5 × 29 =
41,760
72 factors (divisors)
What times what is 41,760?
What number multiplied by what number equals 41,760?
All the combinations of any two natural numbers whose product equals 41,760.
1 × 41,760 = 41,760
2 × 20,880 = 41,760
3 × 13,920 = 41,760
4 × 10,440 = 41,760
5 × 8,352 = 41,760
6 × 6,960 = 41,760
8 × 5,220 = 41,760
9 × 4,640 = 41,760
10 × 4,176 = 41,760
12 × 3,480 = 41,760
15 × 2,784 = 41,760
16 × 2,610 = 41,760
18 × 2,320 = 41,760
20 × 2,088 = 41,760
24 × 1,740 = 41,760
29 × 1,440 = 41,760
30 × 1,392 = 41,760
32 × 1,305 = 41,760
36 × 1,160 = 41,760
40 × 1,044 = 41,760
45 × 928 = 41,760
48 × 870 = 41,760
58 × 720 = 41,760
60 × 696 = 41,760
72 × 580 = 41,760
80 × 522 = 41,760
87 × 480 = 41,760
90 × 464 = 41,760
96 × 435 = 41,760
116 × 360 = 41,760
120 × 348 = 41,760
144 × 290 = 41,760
145 × 288 = 41,760
160 × 261 = 41,760
174 × 240 = 41,760
180 × 232 = 41,760
36 unique multiplications The final answer:
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