20515859

素因数分解:

$7^3\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1$

素因数の和:184

約数の個数: 32

約数和(自身を含む): 26611200

約数和(自身を除く): 6095341

約数列:

[1, 7, 13, 43, 49, 91, 107, 301, 343, 559, 637, 749, 1391, 2107, 3913, 4459, 4601, 5243, 9737, 14749, 27391, 32207, 36701, 59813, 68159, 191737, 225449, 418691, 477113, 1578143, 2930837, 20515859]

約数ペア:

[(1, 20515859), (7, 2930837), (13, 1578143), (43, 477113), (49, 418691), (91, 225449), (107, 191737), (301, 68159), (343, 59813), (559, 36701), (637, 32207), (749, 27391), (1391, 14749), (2107, 9737), (3913, 5243), (4459, 4601)]