6,491,020

2² × 5 × 491 × 661

Starting at 6,491,020, the Collatz iteration reaches 1 after 209 steps. The first transition is 3245510; the starting value is even with 24 positive divisors.

Prime Factor Structure

Factorization String 2^2 × 5 × 491 × 661

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 13,679,568

Proper Divisor Sum 7,188,548

Digit Sum / Digital Root 22 (Root: 4)

Adjacent Primes #6491011 ← → #6491039

Radix Representation

Decimal	6491020
Binary	11000110000101110001100 (23 bits)
Octal	0o30605614
Hexadecimal	0x630B8C

Divisor Catalog (24)

1 2 4 5 10 20 491 661 982 1,322 1,964 2,455 2,644 3,305 4,910 6,610 9,820 13,220 324,551 649,102 1,298,204 1,622,755 3,245,510 6,491,020

Collatz Trajectory (209 steps to reach 1)

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

6,491,020 3,245,510 1,622,755 4,868,266 2,434,133 7,302,400 3,651,200 1,825,600 912,800 456,400 228,200 114,100 57,050 28,525 85,576 42,788 21,394 10,697 32,092 16,046 8,023 24,070 12,035 36,106 18,053 54,160 27,080 13,540 6,770 3,385 10,156 5,078 2,539 7,618 3,809 11,428 5,714 2,857 8,572 4,286 2,143 6,430 3,215 9,646 4,823 14,470 7,235 21,706 10,853 32,560 16,280 8,140 4,070 2,035 6,106 3,053 9,160 4,580 2,290 1,145

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