30 lines
981 B
YAML
30 lines
981 B
YAML
title: What is the value of the first triangle number to have over five hundred divisors?
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url: http://projecteuler.net/problem=12
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desc: |
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The sequence of triangle numbers is generated by adding the natural numbers. So the 7th triangle number would be 1 + 2 + 3 + 4 + 5 + 6 + 7 = 28. The first ten terms would be:
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1, 3, 6, 10, 15, 21, 28, 36, 45, 55, ...
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Let us list the factors of the first seven triangle numbers:
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1: 1
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3: 1,3
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6: 1,2,3,6
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10: 1,2,5,10
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15: 1,3,5,15
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21: 1,3,7,21
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28: 1,2,4,7,14,28
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We can see that 28 is the first triangle number to have over five divisors.
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What is the value of the first triangle number to have over five hundred divisors?
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solution: |
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Bruteforce - Still kinda slow - Guessing it could be improved
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solutions:
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solve.php:
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desc: Basic solution
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language: php
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solve.rb:
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desc: Basic solution
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language: ruby
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solve.c:
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desc: ANSI C solution compiled with TCC
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language: c |