20489535

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{53}}^1\times {\mathrm{71}}^1$

素因数の和:157

約数の個数: 72

約数和(自身を含む): 40334112

約数和(自身を除く): 19844577

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 53, 55, 71, 99, 121, 159, 165, 213, 265, 355, 363, 477, 495, 583, 605, 639, 781, 795, 1065, 1089, 1749, 1815, 2343, 2385, 2915, 3195, 3763, 3905, 5247, 5445, 6413, 7029, 8591, 8745, 11289, 11715, 18815, 19239, 25773, 26235, 32065, 33867, 35145, 41393, 42955, 56445, 57717, 77319, 96195, 124179, 128865, 169335, 206965, 288585, 372537, 386595, 455323, 620895, 1365969, 1862685, 2276615, 4097907, 6829845, 20489535]

約数ペア:

[(1, 20489535), (3, 6829845), (5, 4097907), (9, 2276615), (11, 1862685), (15, 1365969), (33, 620895), (45, 455323), (53, 386595), (55, 372537), (71, 288585), (99, 206965), (121, 169335), (159, 128865), (165, 124179), (213, 96195), (265, 77319), (355, 57717), (363, 56445), (477, 42955), (495, 41393), (583, 35145), (605, 33867), (639, 32065), (781, 26235), (795, 25773), (1065, 19239), (1089, 18815), (1749, 11715), (1815, 11289), (2343, 8745), (2385, 8591), (2915, 7029), (3195, 6413), (3763, 5445), (3905, 5247)]