20397377

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1$

素因数の和:150

約数の個数: 48

約数和(自身を含む): 28957824

約数和(自身を除く): 8560447

約数列:

[1, 7, 11, 13, 41, 49, 71, 77, 91, 143, 287, 451, 497, 533, 539, 637, 781, 923, 1001, 2009, 2911, 3157, 3479, 3731, 5467, 5863, 6461, 7007, 10153, 20377, 22099, 26117, 32021, 37843, 38269, 41041, 45227, 71071, 142639, 224147, 264901, 287287, 416273, 497497, 1569029, 1854307, 2913911, 20397377]

約数ペア:

[(1, 20397377), (7, 2913911), (11, 1854307), (13, 1569029), (41, 497497), (49, 416273), (71, 287287), (77, 264901), (91, 224147), (143, 142639), (287, 71071), (451, 45227), (497, 41041), (533, 38269), (539, 37843), (637, 32021), (781, 26117), (923, 22099), (1001, 20377), (2009, 10153), (2911, 7007), (3157, 6461), (3479, 5863), (3731, 5467)]