21317439

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1$

素因数の和:160

約数の個数: 64

約数和(自身を含む): 36771840

約数和(自身を除く): 15454401

約数列:

[1, 3, 11, 13, 17, 33, 37, 39, 51, 79, 111, 143, 187, 221, 237, 407, 429, 481, 561, 629, 663, 869, 1027, 1221, 1343, 1443, 1887, 2431, 2607, 2923, 3081, 4029, 5291, 6919, 7293, 8177, 8769, 11297, 14773, 15873, 17459, 20757, 24531, 32153, 33891, 37999, 44319, 49691, 52377, 89947, 96459, 113997, 149073, 192049, 269841, 417989, 546601, 576147, 645983, 1253967, 1639803, 1937949, 7105813, 21317439]

約数ペア:

[(1, 21317439), (3, 7105813), (11, 1937949), (13, 1639803), (17, 1253967), (33, 645983), (37, 576147), (39, 546601), (51, 417989), (79, 269841), (111, 192049), (143, 149073), (187, 113997), (221, 96459), (237, 89947), (407, 52377), (429, 49691), (481, 44319), (561, 37999), (629, 33891), (663, 32153), (869, 24531), (1027, 20757), (1221, 17459), (1343, 15873), (1443, 14773), (1887, 11297), (2431, 8769), (2607, 8177), (2923, 7293), (3081, 6919), (4029, 5291)]