To find all the divisors of the number 748,000:
- 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 748,000:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
748,000 = 25 × 53 × 11 × 17
748,000 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 748,000
- 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
3 =
8
composite factor = 2 × 5 =
10
prime factor =
11
composite factor = 2
4 =
16
prime factor =
17
composite factor = 2
2 × 5 =
20
composite factor = 2 × 11 =
22
composite factor = 5
2 =
25
composite factor = 2
5 =
32
composite factor = 2 × 17 =
34
composite factor = 2
3 × 5 =
40
composite factor = 2
2 × 11 =
44
composite factor = 2 × 5
2 =
50
composite factor = 5 × 11 =
55
composite factor = 2
2 × 17 =
68
composite factor = 2
4 × 5 =
80
composite factor = 5 × 17 =
85
composite factor = 2
3 × 11 =
88
composite factor = 2
2 × 5
2 =
100
composite factor = 2 × 5 × 11 =
110
composite factor = 5
3 =
125
composite factor = 2
3 × 17 =
136
composite factor = 2
5 × 5 =
160
composite factor = 2 × 5 × 17 =
170
composite factor = 2
4 × 11 =
176
composite factor = 11 × 17 =
187
composite factor = 2
3 × 5
2 =
200
composite factor = 2
2 × 5 × 11 =
220
composite factor = 2 × 5
3 =
250
composite factor = 2
4 × 17 =
272
composite factor = 5
2 × 11 =
275
composite factor = 2
2 × 5 × 17 =
340
composite factor = 2
5 × 11 =
352
composite factor = 2 × 11 × 17 =
374
composite factor = 2
4 × 5
2 =
400
composite factor = 5
2 × 17 =
425
composite factor = 2
3 × 5 × 11 =
440
composite factor = 2
2 × 5
3 =
500
composite factor = 2
5 × 17 =
544
composite factor = 2 × 5
2 × 11 =
550
composite factor = 2
3 × 5 × 17 =
680
composite factor = 2
2 × 11 × 17 =
748
composite factor = 2
5 × 5
2 =
800
composite factor = 2 × 5
2 × 17 =
850
This list continues below...
... This list continues from above
composite factor = 2
4 × 5 × 11 =
880
composite factor = 5 × 11 × 17 =
935
composite factor = 2
3 × 5
3 =
1,000
composite factor = 2
2 × 5
2 × 11 =
1,100
composite factor = 2
4 × 5 × 17 =
1,360
composite factor = 5
3 × 11 =
1,375
composite factor = 2
3 × 11 × 17 =
1,496
composite factor = 2
2 × 5
2 × 17 =
1,700
composite factor = 2
5 × 5 × 11 =
1,760
composite factor = 2 × 5 × 11 × 17 =
1,870
composite factor = 2
4 × 5
3 =
2,000
composite factor = 5
3 × 17 =
2,125
composite factor = 2
3 × 5
2 × 11 =
2,200
composite factor = 2
5 × 5 × 17 =
2,720
composite factor = 2 × 5
3 × 11 =
2,750
composite factor = 2
4 × 11 × 17 =
2,992
composite factor = 2
3 × 5
2 × 17 =
3,400
composite factor = 2
2 × 5 × 11 × 17 =
3,740
composite factor = 2
5 × 5
3 =
4,000
composite factor = 2 × 5
3 × 17 =
4,250
composite factor = 2
4 × 5
2 × 11 =
4,400
composite factor = 5
2 × 11 × 17 =
4,675
composite factor = 2
2 × 5
3 × 11 =
5,500
composite factor = 2
5 × 11 × 17 =
5,984
composite factor = 2
4 × 5
2 × 17 =
6,800
composite factor = 2
3 × 5 × 11 × 17 =
7,480
composite factor = 2
2 × 5
3 × 17 =
8,500
composite factor = 2
5 × 5
2 × 11 =
8,800
composite factor = 2 × 5
2 × 11 × 17 =
9,350
composite factor = 2
3 × 5
3 × 11 =
11,000
composite factor = 2
5 × 5
2 × 17 =
13,600
composite factor = 2
4 × 5 × 11 × 17 =
14,960
composite factor = 2
3 × 5
3 × 17 =
17,000
composite factor = 2
2 × 5
2 × 11 × 17 =
18,700
composite factor = 2
4 × 5
3 × 11 =
22,000
composite factor = 5
3 × 11 × 17 =
23,375
composite factor = 2
5 × 5 × 11 × 17 =
29,920
composite factor = 2
4 × 5
3 × 17 =
34,000
composite factor = 2
3 × 5
2 × 11 × 17 =
37,400
composite factor = 2
5 × 5
3 × 11 =
44,000
composite factor = 2 × 5
3 × 11 × 17 =
46,750
composite factor = 2
5 × 5
3 × 17 =
68,000
composite factor = 2
4 × 5
2 × 11 × 17 =
74,800
composite factor = 2
2 × 5
3 × 11 × 17 =
93,500
composite factor = 2
5 × 5
2 × 11 × 17 =
149,600
composite factor = 2
3 × 5
3 × 11 × 17 =
187,000
composite factor = 2
4 × 5
3 × 11 × 17 =
374,000
composite factor = 2
5 × 5
3 × 11 × 17 =
748,000
96 factors (divisors)
What times what is 748,000?
What number multiplied by what number equals 748,000?
All the combinations of any two natural numbers whose product equals 748,000.
1 × 748,000 = 748,000
2 × 374,000 = 748,000
4 × 187,000 = 748,000
5 × 149,600 = 748,000
8 × 93,500 = 748,000
10 × 74,800 = 748,000
11 × 68,000 = 748,000
16 × 46,750 = 748,000
17 × 44,000 = 748,000
20 × 37,400 = 748,000
22 × 34,000 = 748,000
25 × 29,920 = 748,000
32 × 23,375 = 748,000
34 × 22,000 = 748,000
40 × 18,700 = 748,000
44 × 17,000 = 748,000
50 × 14,960 = 748,000
55 × 13,600 = 748,000
68 × 11,000 = 748,000
80 × 9,350 = 748,000
85 × 8,800 = 748,000
88 × 8,500 = 748,000
100 × 7,480 = 748,000
110 × 6,800 = 748,000
125 × 5,984 = 748,000
136 × 5,500 = 748,000
160 × 4,675 = 748,000
170 × 4,400 = 748,000
176 × 4,250 = 748,000
187 × 4,000 = 748,000
200 × 3,740 = 748,000
220 × 3,400 = 748,000
250 × 2,992 = 748,000
272 × 2,750 = 748,000
275 × 2,720 = 748,000
340 × 2,200 = 748,000
352 × 2,125 = 748,000
374 × 2,000 = 748,000
400 × 1,870 = 748,000
425 × 1,760 = 748,000
440 × 1,700 = 748,000
500 × 1,496 = 748,000
544 × 1,375 = 748,000
550 × 1,360 = 748,000
680 × 1,100 = 748,000
748 × 1,000 = 748,000
800 × 935 = 748,000
850 × 880 = 748,000
48 unique multiplications The final answer:
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