20661355

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1$

素因数の和:148

約数の個数: 48

約数和(自身を含む): 30566592

約数和(自身を除く): 9905237

約数列:

[1, 5, 11, 13, 37, 55, 65, 71, 121, 143, 185, 355, 407, 481, 605, 715, 781, 923, 1573, 2035, 2405, 2627, 3905, 4477, 4615, 5291, 7865, 8591, 10153, 13135, 22385, 26455, 28897, 34151, 42955, 50765, 58201, 111683, 144485, 170755, 291005, 317867, 375661, 558415, 1589335, 1878305, 4132271, 20661355]

約数ペア:

[(1, 20661355), (5, 4132271), (11, 1878305), (13, 1589335), (37, 558415), (55, 375661), (65, 317867), (71, 291005), (121, 170755), (143, 144485), (185, 111683), (355, 58201), (407, 50765), (481, 42955), (605, 34151), (715, 28897), (781, 26455), (923, 22385), (1573, 13135), (2035, 10153), (2405, 8591), (2627, 7865), (3905, 5291), (4477, 4615)]