93
XCIII
1011101
The number 93 — factors and divisors
Deficient
93 = 3 × 31. It has 4 divisors, adding up to 128.
Its divisors, itself excluded, add up to less than the number.
Laid out as dots
It fits as 3 × 31. The more divisors, the closer to a square.
- Prime factors
- 3 × 31
- Divisors
- 1, 3, 31, 93
- Sum of divisors
- 128
- Sum without itself
- 35
- Coprime below it
- 60
- Digit sum
- 12
- Digital root
- 3
- Roman numeral
- XCIII
- Binary
- 1011101
- Octal
- 135
- Hexadecimal
- 5D
- Base 36
- 2L
- Bits
- 7 bits
- Collatz steps
- 17 steps · peaks at 280
- Prime before
- 89
- Prime after
- 97
The grid
Ten per row, twenty rows. The filled cells are primes — you can see the multiples of 2 and 5 drop out in columns.
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Numbers either side
How to read this
- The prime factors are what the number is made of. The count and sum of divisors both follow from them.
- Add the divisors, take the number away, and you get perfect, abundant or deficient.
- The length of the binary form is the bit count. 255 taking eight digits is what a byte is.
- Collatz: halve it if even, triple it and add one if odd. The count is how many moves reach 1.
Frequently asked questions
Q. Is 93 a prime number?
No. It breaks down into 3 × 31.
Q. What are the divisors of 93?
1, 3, 31, 93 — 4 divisors in all, adding up to 128.
Q. How is 93 written in binary?
1011101, which is 7 bits. In hexadecimal it is 5D.
Q. How many Collatz steps does 93 take?
It reaches 1 in 17, peaking at 280 on the way.