2² × 5² × 9781

Prime Factor Structure

Factorization String 2^2 × 5^2 × 9781

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 18

Divisor Sum (σ) 2,122,694

Proper Divisor Sum 1,144,594

Digit Sum / Digital Root 25 (Root: 7)

Adjacent Primes #978091 ← → #978113

1 2 4 5 10 20 25 50 100 9,781 19,562 39,124 48,905 97,810 195,620 244,525 489,050 978,100

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

978,100 489,050 244,525 733,576 366,788 183,394 91,697 275,092 137,546 68,773 206,320 103,160 51,580 25,790 12,895 38,686 19,343 58,030 29,015 87,046 43,523 130,570 65,285 195,856 97,928 48,964 24,482 12,241 36,724 18,362 9,181 27,544 13,772 6,886 3,443 10,330 5,165 15,496 7,748 3,874 1,937 5,812 2,906 1,453 4,360 2,180 1,090 545 1,636 818 409 1,228 614 307 922 461 1,384 692 346 173

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