aliquotSum

Sum all proper divisors of a number.

Similar: properDivisors, aliquotSum, isPrime.

function aliquotSum(x)
// x: a number

const xmath = require('extra-math');


xmath.aliquotSum(6);
// → 6 (1+2+3)

xmath.aliquotSum(1);
// → 0

xmath.aliquotSum(0);
// → 0

xmath.aliquotSum(-24);
// → 36 (1+2+3+4+6+8+12)

References

• Proper Divisor: Wolfram Mathworld
• Aliquot sum: Wikipedia