To find all the divisors of the number 47,520:
- 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 47,520:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
47,520 = 25 × 33 × 5 × 11
47,520 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) × (3 + 1) × (1 + 1) × (1 + 1) = 6 × 4 × 2 × 2 = 96
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 47,520
- 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
prime factor =
11
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 × 11 =
22
composite factor = 2
3 × 3 =
24
composite factor = 3
3 =
27
composite factor = 2 × 3 × 5 =
30
composite factor = 2
5 =
32
composite factor = 3 × 11 =
33
composite factor = 2
2 × 3
2 =
36
composite factor = 2
3 × 5 =
40
composite factor = 2
2 × 11 =
44
composite factor = 3
2 × 5 =
45
composite factor = 2
4 × 3 =
48
composite factor = 2 × 3
3 =
54
composite factor = 5 × 11 =
55
composite factor = 2
2 × 3 × 5 =
60
composite factor = 2 × 3 × 11 =
66
composite factor = 2
3 × 3
2 =
72
composite factor = 2
4 × 5 =
80
composite factor = 2
3 × 11 =
88
composite factor = 2 × 3
2 × 5 =
90
composite factor = 2
5 × 3 =
96
composite factor = 3
2 × 11 =
99
composite factor = 2
2 × 3
3 =
108
composite factor = 2 × 5 × 11 =
110
composite factor = 2
3 × 3 × 5 =
120
composite factor = 2
2 × 3 × 11 =
132
composite factor = 3
3 × 5 =
135
composite factor = 2
4 × 3
2 =
144
composite factor = 2
5 × 5 =
160
composite factor = 3 × 5 × 11 =
165
composite factor = 2
4 × 11 =
176
composite factor = 2
2 × 3
2 × 5 =
180
composite factor = 2 × 3
2 × 11 =
198
composite factor = 2
3 × 3
3 =
216
This list continues below...
... This list continues from above
composite factor = 2
2 × 5 × 11 =
220
composite factor = 2
4 × 3 × 5 =
240
composite factor = 2
3 × 3 × 11 =
264
composite factor = 2 × 3
3 × 5 =
270
composite factor = 2
5 × 3
2 =
288
composite factor = 3
3 × 11 =
297
composite factor = 2 × 3 × 5 × 11 =
330
composite factor = 2
5 × 11 =
352
composite factor = 2
3 × 3
2 × 5 =
360
composite factor = 2
2 × 3
2 × 11 =
396
composite factor = 2
4 × 3
3 =
432
composite factor = 2
3 × 5 × 11 =
440
composite factor = 2
5 × 3 × 5 =
480
composite factor = 3
2 × 5 × 11 =
495
composite factor = 2
4 × 3 × 11 =
528
composite factor = 2
2 × 3
3 × 5 =
540
composite factor = 2 × 3
3 × 11 =
594
composite factor = 2
2 × 3 × 5 × 11 =
660
composite factor = 2
4 × 3
2 × 5 =
720
composite factor = 2
3 × 3
2 × 11 =
792
composite factor = 2
5 × 3
3 =
864
composite factor = 2
4 × 5 × 11 =
880
composite factor = 2 × 3
2 × 5 × 11 =
990
composite factor = 2
5 × 3 × 11 =
1,056
composite factor = 2
3 × 3
3 × 5 =
1,080
composite factor = 2
2 × 3
3 × 11 =
1,188
composite factor = 2
3 × 3 × 5 × 11 =
1,320
composite factor = 2
5 × 3
2 × 5 =
1,440
composite factor = 3
3 × 5 × 11 =
1,485
composite factor = 2
4 × 3
2 × 11 =
1,584
composite factor = 2
5 × 5 × 11 =
1,760
composite factor = 2
2 × 3
2 × 5 × 11 =
1,980
composite factor = 2
4 × 3
3 × 5 =
2,160
composite factor = 2
3 × 3
3 × 11 =
2,376
composite factor = 2
4 × 3 × 5 × 11 =
2,640
composite factor = 2 × 3
3 × 5 × 11 =
2,970
composite factor = 2
5 × 3
2 × 11 =
3,168
composite factor = 2
3 × 3
2 × 5 × 11 =
3,960
composite factor = 2
5 × 3
3 × 5 =
4,320
composite factor = 2
4 × 3
3 × 11 =
4,752
composite factor = 2
5 × 3 × 5 × 11 =
5,280
composite factor = 2
2 × 3
3 × 5 × 11 =
5,940
composite factor = 2
4 × 3
2 × 5 × 11 =
7,920
composite factor = 2
5 × 3
3 × 11 =
9,504
composite factor = 2
3 × 3
3 × 5 × 11 =
11,880
composite factor = 2
5 × 3
2 × 5 × 11 =
15,840
composite factor = 2
4 × 3
3 × 5 × 11 =
23,760
composite factor = 2
5 × 3
3 × 5 × 11 =
47,520
96 factors (divisors)
What times what is 47,520?
What number multiplied by what number equals 47,520?
All the combinations of any two natural numbers whose product equals 47,520.
1 × 47,520 = 47,520
2 × 23,760 = 47,520
3 × 15,840 = 47,520
4 × 11,880 = 47,520
5 × 9,504 = 47,520
6 × 7,920 = 47,520
8 × 5,940 = 47,520
9 × 5,280 = 47,520
10 × 4,752 = 47,520
11 × 4,320 = 47,520
12 × 3,960 = 47,520
15 × 3,168 = 47,520
16 × 2,970 = 47,520
18 × 2,640 = 47,520
20 × 2,376 = 47,520
22 × 2,160 = 47,520
24 × 1,980 = 47,520
27 × 1,760 = 47,520
30 × 1,584 = 47,520
32 × 1,485 = 47,520
33 × 1,440 = 47,520
36 × 1,320 = 47,520
40 × 1,188 = 47,520
44 × 1,080 = 47,520
45 × 1,056 = 47,520
48 × 990 = 47,520
54 × 880 = 47,520
55 × 864 = 47,520
60 × 792 = 47,520
66 × 720 = 47,520
72 × 660 = 47,520
80 × 594 = 47,520
88 × 540 = 47,520
90 × 528 = 47,520
96 × 495 = 47,520
99 × 480 = 47,520
108 × 440 = 47,520
110 × 432 = 47,520
120 × 396 = 47,520
132 × 360 = 47,520
135 × 352 = 47,520
144 × 330 = 47,520
160 × 297 = 47,520
165 × 288 = 47,520
176 × 270 = 47,520
180 × 264 = 47,520
198 × 240 = 47,520
216 × 220 = 47,520
48 unique multiplications The final answer:
(scroll down)