720,642

2 × 3 × 13 × 9239

Prime Factor Structure

Factorization String 2 × 3 × 13 × 9239

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Total Divisors 16

Divisor Sum (σ) 1,552,320

Proper Divisor Sum 831,678

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #720619 ← → #720653

1 2 3 6 13 26 39 78 9,239 18,478 27,717 55,434 120,107 240,214 360,321 720,642

Iterative sequence n → n/2 (if even) or 3n+1 (if odd):

720,642 360,321 1,080,964 540,482 270,241 810,724 405,362 202,681 608,044 304,022 152,011 456,034 228,017 684,052 342,026 171,013 513,040 256,520 128,260 64,130 32,065 96,196 48,098 24,049 72,148 36,074 18,037 54,112 27,056 13,528 6,764 3,382 1,691 5,074 2,537 7,612 3,806 1,903 5,710 2,855 8,566 4,283 12,850 6,425 19,276 9,638 4,819 14,458 7,229 21,688 10,844 5,422 2,711 8,134 4,067 12,202 6,101 18,304 9,152 4,576

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