20823803

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{293}}^1$

素因数の和:395

約数の個数: 32

約数和(自身を含む): 28449792

約数和(自身を除く): 7625989

約数列:

[1, 7, 11, 13, 71, 77, 91, 143, 293, 497, 781, 923, 1001, 2051, 3223, 3809, 5467, 6461, 10153, 20803, 22561, 26663, 41899, 71071, 145621, 228833, 270439, 293293, 1601831, 1893073, 2974829, 20823803]

約数ペア:

[(1, 20823803), (7, 2974829), (11, 1893073), (13, 1601831), (71, 293293), (77, 270439), (91, 228833), (143, 145621), (293, 71071), (497, 41899), (781, 26663), (923, 22561), (1001, 20803), (2051, 10153), (3223, 6461), (3809, 5467)]