2 × 5 × 257²

Prime Factor Structure

Factorization String 2 × 5 × 257^2

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 1,193,526

Proper Divisor Sum 533,036

Digit Sum / Digital Root 25 (Root: 7)

Adjacent Primes #660449 ← → #660493

1 2 5 10 257 514 1,285 2,570 66,049 132,098 330,245 660,490

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

660,490 330,245 990,736 495,368 247,684 123,842 61,921 185,764 92,882 46,441 139,324 69,662 34,831 104,494 52,247 156,742 78,371 235,114 117,557 352,672 176,336 88,168 44,084 22,042 11,021 33,064 16,532 8,266 4,133 12,400 6,200 3,100 1,550 775 2,326 1,163 3,490 1,745 5,236 2,618 1,309 3,928 1,964 982 491 1,474 737 2,212 1,106 553 1,660 830 415 1,246 623 1,870 935 2,806 1,403 4,210

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