20704005

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{109}}^1$

素因数の和:200

約数の個数: 80

約数和(自身を含む): 43443840

約数和(自身を除く): 22739835

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 67, 81, 105, 109, 135, 189, 201, 315, 327, 335, 405, 469, 545, 567, 603, 763, 945, 981, 1005, 1407, 1635, 1809, 2289, 2345, 2835, 2943, 3015, 3815, 4221, 4905, 5427, 6867, 7035, 7303, 8829, 9045, 11445, 12663, 14715, 20601, 21105, 21909, 27135, 34335, 36515, 37989, 44145, 51121, 61803, 63315, 65727, 103005, 109545, 153363, 189945, 197181, 255605, 309015, 328635, 460089, 591543, 766815, 985905, 1380267, 2300445, 2957715, 4140801, 6901335, 20704005]

約数ペア:

[(1, 20704005), (3, 6901335), (5, 4140801), (7, 2957715), (9, 2300445), (15, 1380267), (21, 985905), (27, 766815), (35, 591543), (45, 460089), (63, 328635), (67, 309015), (81, 255605), (105, 197181), (109, 189945), (135, 153363), (189, 109545), (201, 103005), (315, 65727), (327, 63315), (335, 61803), (405, 51121), (469, 44145), (545, 37989), (567, 36515), (603, 34335), (763, 27135), (945, 21909), (981, 21105), (1005, 20601), (1407, 14715), (1635, 12663), (1809, 11445), (2289, 9045), (2345, 8829), (2835, 7303), (2943, 7035), (3015, 6867), (3815, 5427), (4221, 4905)]