20978595

素因数分解:

$3^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{277}}^1$

素因数の和:322

約数の個数: 80

約数和(自身を含む): 43594848

約数和(自身を除く): 22616253

約数列:

[1, 3, 5, 9, 11, 15, 17, 27, 33, 45, 51, 55, 81, 85, 99, 135, 153, 165, 187, 255, 277, 297, 405, 459, 495, 561, 765, 831, 891, 935, 1377, 1385, 1485, 1683, 2295, 2493, 2805, 3047, 4155, 4455, 4709, 5049, 6885, 7479, 8415, 9141, 12465, 14127, 15147, 15235, 22437, 23545, 25245, 27423, 37395, 42381, 45705, 51799, 70635, 75735, 82269, 112185, 127143, 137115, 155397, 211905, 246807, 258995, 381429, 411345, 466191, 635715, 776985, 1234035, 1398573, 1907145, 2330955, 4195719, 6992865, 20978595]

約数ペア:

[(1, 20978595), (3, 6992865), (5, 4195719), (9, 2330955), (11, 1907145), (15, 1398573), (17, 1234035), (27, 776985), (33, 635715), (45, 466191), (51, 411345), (55, 381429), (81, 258995), (85, 246807), (99, 211905), (135, 155397), (153, 137115), (165, 127143), (187, 112185), (255, 82269), (277, 75735), (297, 70635), (405, 51799), (459, 45705), (495, 42381), (561, 37395), (765, 27423), (831, 25245), (891, 23545), (935, 22437), (1377, 15235), (1385, 15147), (1485, 14127), (1683, 12465), (2295, 9141), (2493, 8415), (2805, 7479), (3047, 6885), (4155, 5049), (4455, 4709)]