To find all the divisors of the number 148,500:
- 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 148,500:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
148,500 = 22 × 33 × 53 × 11
148,500 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) × (3 + 1) × (3 + 1) × (1 + 1) = 3 × 4 × 4 × 2 = 96
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 148,500
- 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 = 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 × 3
2 =
18
composite factor = 2
2 × 5 =
20
composite factor = 2 × 11 =
22
composite factor = 5
2 =
25
composite factor = 3
3 =
27
composite factor = 2 × 3 × 5 =
30
composite factor = 3 × 11 =
33
composite factor = 2
2 × 3
2 =
36
composite factor = 2
2 × 11 =
44
composite factor = 3
2 × 5 =
45
composite factor = 2 × 5
2 =
50
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 = 3 × 5
2 =
75
composite factor = 2 × 3
2 × 5 =
90
composite factor = 3
2 × 11 =
99
composite factor = 2
2 × 5
2 =
100
composite factor = 2
2 × 3
3 =
108
composite factor = 2 × 5 × 11 =
110
composite factor = 5
3 =
125
composite factor = 2
2 × 3 × 11 =
132
composite factor = 3
3 × 5 =
135
composite factor = 2 × 3 × 5
2 =
150
composite factor = 3 × 5 × 11 =
165
composite factor = 2
2 × 3
2 × 5 =
180
composite factor = 2 × 3
2 × 11 =
198
composite factor = 2
2 × 5 × 11 =
220
composite factor = 3
2 × 5
2 =
225
composite factor = 2 × 5
3 =
250
composite factor = 2 × 3
3 × 5 =
270
composite factor = 5
2 × 11 =
275
composite factor = 3
3 × 11 =
297
composite factor = 2
2 × 3 × 5
2 =
300
composite factor = 2 × 3 × 5 × 11 =
330
composite factor = 3 × 5
3 =
375
This list continues below...
... This list continues from above
composite factor = 2
2 × 3
2 × 11 =
396
composite factor = 2 × 3
2 × 5
2 =
450
composite factor = 3
2 × 5 × 11 =
495
composite factor = 2
2 × 5
3 =
500
composite factor = 2
2 × 3
3 × 5 =
540
composite factor = 2 × 5
2 × 11 =
550
composite factor = 2 × 3
3 × 11 =
594
composite factor = 2
2 × 3 × 5 × 11 =
660
composite factor = 3
3 × 5
2 =
675
composite factor = 2 × 3 × 5
3 =
750
composite factor = 3 × 5
2 × 11 =
825
composite factor = 2
2 × 3
2 × 5
2 =
900
composite factor = 2 × 3
2 × 5 × 11 =
990
composite factor = 2
2 × 5
2 × 11 =
1,100
composite factor = 3
2 × 5
3 =
1,125
composite factor = 2
2 × 3
3 × 11 =
1,188
composite factor = 2 × 3
3 × 5
2 =
1,350
composite factor = 5
3 × 11 =
1,375
composite factor = 3
3 × 5 × 11 =
1,485
composite factor = 2
2 × 3 × 5
3 =
1,500
composite factor = 2 × 3 × 5
2 × 11 =
1,650
composite factor = 2
2 × 3
2 × 5 × 11 =
1,980
composite factor = 2 × 3
2 × 5
3 =
2,250
composite factor = 3
2 × 5
2 × 11 =
2,475
composite factor = 2
2 × 3
3 × 5
2 =
2,700
composite factor = 2 × 5
3 × 11 =
2,750
composite factor = 2 × 3
3 × 5 × 11 =
2,970
composite factor = 2
2 × 3 × 5
2 × 11 =
3,300
composite factor = 3
3 × 5
3 =
3,375
composite factor = 3 × 5
3 × 11 =
4,125
composite factor = 2
2 × 3
2 × 5
3 =
4,500
composite factor = 2 × 3
2 × 5
2 × 11 =
4,950
composite factor = 2
2 × 5
3 × 11 =
5,500
composite factor = 2
2 × 3
3 × 5 × 11 =
5,940
composite factor = 2 × 3
3 × 5
3 =
6,750
composite factor = 3
3 × 5
2 × 11 =
7,425
composite factor = 2 × 3 × 5
3 × 11 =
8,250
composite factor = 2
2 × 3
2 × 5
2 × 11 =
9,900
composite factor = 3
2 × 5
3 × 11 =
12,375
composite factor = 2
2 × 3
3 × 5
3 =
13,500
composite factor = 2 × 3
3 × 5
2 × 11 =
14,850
composite factor = 2
2 × 3 × 5
3 × 11 =
16,500
composite factor = 2 × 3
2 × 5
3 × 11 =
24,750
composite factor = 2
2 × 3
3 × 5
2 × 11 =
29,700
composite factor = 3
3 × 5
3 × 11 =
37,125
composite factor = 2
2 × 3
2 × 5
3 × 11 =
49,500
composite factor = 2 × 3
3 × 5
3 × 11 =
74,250
composite factor = 2
2 × 3
3 × 5
3 × 11 =
148,500
96 factors (divisors)
What times what is 148,500?
What number multiplied by what number equals 148,500?
All the combinations of any two natural numbers whose product equals 148,500.
1 × 148,500 = 148,500
2 × 74,250 = 148,500
3 × 49,500 = 148,500
4 × 37,125 = 148,500
5 × 29,700 = 148,500
6 × 24,750 = 148,500
9 × 16,500 = 148,500
10 × 14,850 = 148,500
11 × 13,500 = 148,500
12 × 12,375 = 148,500
15 × 9,900 = 148,500
18 × 8,250 = 148,500
20 × 7,425 = 148,500
22 × 6,750 = 148,500
25 × 5,940 = 148,500
27 × 5,500 = 148,500
30 × 4,950 = 148,500
33 × 4,500 = 148,500
36 × 4,125 = 148,500
44 × 3,375 = 148,500
45 × 3,300 = 148,500
50 × 2,970 = 148,500
54 × 2,750 = 148,500
55 × 2,700 = 148,500
60 × 2,475 = 148,500
66 × 2,250 = 148,500
75 × 1,980 = 148,500
90 × 1,650 = 148,500
99 × 1,500 = 148,500
100 × 1,485 = 148,500
108 × 1,375 = 148,500
110 × 1,350 = 148,500
125 × 1,188 = 148,500
132 × 1,125 = 148,500
135 × 1,100 = 148,500
150 × 990 = 148,500
165 × 900 = 148,500
180 × 825 = 148,500
198 × 750 = 148,500
220 × 675 = 148,500
225 × 660 = 148,500
250 × 594 = 148,500
270 × 550 = 148,500
275 × 540 = 148,500
297 × 500 = 148,500
300 × 495 = 148,500
330 × 450 = 148,500
375 × 396 = 148,500
48 unique multiplications The final answer:
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