21337589

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1$

素因数の和:130

約数の個数: 48

約数和(自身を含む): 29494080

約数和(自身を除く): 8156491

約数列:

[1, 7, 13, 19, 41, 43, 49, 91, 133, 247, 287, 301, 533, 559, 637, 779, 817, 931, 1729, 1763, 2009, 2107, 3731, 3913, 5453, 5719, 10127, 10621, 12103, 12341, 22919, 26117, 27391, 33497, 38171, 40033, 70889, 74347, 86387, 160433, 234479, 435461, 496223, 520429, 1123031, 1641353, 3048227, 21337589]

約数ペア:

[(1, 21337589), (7, 3048227), (13, 1641353), (19, 1123031), (41, 520429), (43, 496223), (49, 435461), (91, 234479), (133, 160433), (247, 86387), (287, 74347), (301, 70889), (533, 40033), (559, 38171), (637, 33497), (779, 27391), (817, 26117), (931, 22919), (1729, 12341), (1763, 12103), (2009, 10621), (2107, 10127), (3731, 5719), (3913, 5453)]