1,640,486

2 × 820243

Prime Factor Structure

Factorization String 2 × 820243

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Total Divisors 4

Divisor Sum (σ) 2,460,732

Proper Divisor Sum 820,246

Digit Sum / Digital Root 29 (Root: 2)

Adjacent Primes #1640467 ← → #1640497

1 2 820,243 1,640,486

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

1,640,486 820,243 2,460,730 1,230,365 3,691,096 1,845,548 922,774 461,387 1,384,162 692,081 2,076,244 1,038,122 519,061 1,557,184 778,592 389,296 194,648 97,324 48,662 24,331 72,994 36,497 109,492 54,746 27,373 82,120 41,060 20,530 10,265 30,796 15,398 7,699 23,098 11,549 34,648 17,324 8,662 4,331 12,994 6,497 19,492 9,746 4,873 14,620 7,310 3,655 10,966 5,483 16,450 8,225 24,676 12,338 6,169 18,508 9,254 4,627 13,882 6,941 20,824 10,412

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