81957785

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1$

素因数の和:198

約数の個数: 64

約数和(自身を含む): 127733760

約数和(自身を除く): 45775975

約数列:

[1, 5, 7, 13, 35, 43, 59, 65, 71, 91, 215, 295, 301, 355, 413, 455, 497, 559, 767, 923, 1505, 2065, 2485, 2537, 2795, 3053, 3835, 3913, 4189, 4615, 5369, 6461, 12685, 15265, 17759, 19565, 20945, 21371, 26845, 29323, 32305, 32981, 39689, 54457, 88795, 106855, 146615, 164905, 180127, 198445, 230867, 272285, 277823, 381199, 900635, 1154335, 1260889, 1389115, 1905995, 2341651, 6304445, 11708255, 16391557, 81957785]

約数ペア:

[(1, 81957785), (5, 16391557), (7, 11708255), (13, 6304445), (35, 2341651), (43, 1905995), (59, 1389115), (65, 1260889), (71, 1154335), (91, 900635), (215, 381199), (295, 277823), (301, 272285), (355, 230867), (413, 198445), (455, 180127), (497, 164905), (559, 146615), (767, 106855), (923, 88795), (1505, 54457), (2065, 39689), (2485, 32981), (2537, 32305), (2795, 29323), (3053, 26845), (3835, 21371), (3913, 20945), (4189, 19565), (4615, 17759), (5369, 15265), (6461, 12685)]