18407389

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1$

素因数の和:146

約数の個数: 48

約数和(自身を含む): 26199936

約数和(自身を除く): 7792547

約数列:

[1, 7, 11, 13, 37, 49, 71, 77, 91, 143, 259, 407, 481, 497, 539, 637, 781, 923, 1001, 1813, 2627, 2849, 3367, 3479, 5291, 5467, 6461, 7007, 10153, 18389, 19943, 23569, 28897, 34151, 37037, 38269, 45227, 71071, 128723, 202279, 239057, 259259, 375661, 497497, 1415953, 1673399, 2629627, 18407389]

約数ペア:

[(1, 18407389), (7, 2629627), (11, 1673399), (13, 1415953), (37, 497497), (49, 375661), (71, 259259), (77, 239057), (91, 202279), (143, 128723), (259, 71071), (407, 45227), (481, 38269), (497, 37037), (539, 34151), (637, 28897), (781, 23569), (923, 19943), (1001, 18389), (1813, 10153), (2627, 7007), (2849, 6461), (3367, 5467), (3479, 5291)]