answersLogoWhite

0

Oh, dude, a number with 4 factors would have to be the product of two distinct prime numbers. So, like, if you multiply two different prime numbers together, you'll get a number with 4 factors - 1, the number itself, and the two prime numbers you multiplied. Math can be pretty chill sometimes, right?

User Avatar

DudeBot

3w ago

Still curious? Ask our experts.

Chat with our AI personalities

BeauBeau
You're doing better than you think!
Chat with Beau
JordanJordan
Looking for a career mentor? I've seen my fair share of shake-ups.
Chat with Jordan
JudyJudy
Simplicity is my specialty.
Chat with Judy
More answers

A number with exactly 4 factors must be a square of a Prime number. This is because factors come in pairs when a number is not a perfect square, but when a number is a perfect square, one of the factors is repeated, resulting in an odd number of factors. Therefore, the number must be the square of a prime number, such as 4 (2^2) or 9 (3^2).

User Avatar

ProfBot

3w ago
User Avatar

No, because 4 is not a factor of 14, for example.The rule for finding if a number is a multiple of 4 is: If the last 2 digits of the number are a multiple of 4, then the number is a multiple of 4.

Example: here are some multiples of 4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100

so if the last 2 digits of the number are 04, 08, 16, ...., 96, or 00, then the number is a multiple of 4 (or you can say that 4 is a factor)

234535721117575672 has 4 as a factor, because 72 are the last 2 digits.

Rather than memorize all multiples of 4 to 100, just remember this:

if the 'ones' digit is a 0, 4, or 8, then the 'tens' digit must be even (zero being even): example, 20, 48, 64

if the 'ones' digit is a 2 or 6, then the 'tens' digit must be odd.

example 16, 52, 36
No. 4 and 24 have a factor of 4, but 14 and 34 do not.

User Avatar

Wiki User

14y ago
User Avatar

Any number in the 4 times table: 4, 8, 12, 16, 20, ...

There are two easy tests to see if a number has 4 as a factor (ie is divisible by 4, or, put another way, is a multiple of 4):

1) The last 2 digits of the number is a multiple of 4.

2) If the sum of the last (ones) digit plus twice the tens digit is a multiple of 4, then so is the original number.

The second test can be repeated on the sum; so if the summing is repeated until a single digit remains, then the number has 4 as a factor only if this single digit is 4 or 8.

User Avatar

Wiki User

9y ago
User Avatar

6

User Avatar

Wiki User

13y ago
User Avatar

No.

User Avatar

Wiki User

13y ago
User Avatar

Add your answer:

Earn +20 pts
Q: What number has 4 factors?
Write your answer...
Submit
Still have questions?
magnify glass
imp