230
CCXXX
11100110
The number 230 — factors and divisors
Deficient
230 = 2 × 5 × 23. It has 8 divisors, adding up to 432.
Its divisors, itself excluded, add up to less than the number.
Laid out as dots
It fits as 10 × 23. The more divisors, the closer to a square.
- Prime factors
- 2 × 5 × 23
- Divisors
- 1, 2, 5, 10, 23, 46, 115, 230
- Sum of divisors
- 432
- Sum without itself
- 202
- Coprime below it
- 88
- Digit sum
- 5
- Digital root
- 5
- Roman numeral
- CCXXX
- Binary
- 11100110
- Octal
- 346
- Hexadecimal
- E6
- Base 36
- 6E
- Bits
- 8 bits
- Collatz steps
- 34 steps · peaks at 520
- Prime before
- 229
- Prime after
- 233
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 230 a prime number?
No. It breaks down into 2 × 5 × 23.
Q. What are the divisors of 230?
1, 2, 5, 10, 23, 46, 115, 230 — 8 divisors in all, adding up to 432.
Q. How is 230 written in binary?
11100110, which is 8 bits. In hexadecimal it is E6.
Q. How many Collatz steps does 230 take?
It reaches 1 in 34, peaking at 520 on the way.