261566305

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{4751}}^1$

素因数の和:4798

約数の個数: 48

約数和(自身を含む): 424714752

約数和(自身を除く): 163148447

約数列:

[1, 5, 7, 11, 13, 35, 55, 65, 77, 91, 121, 143, 385, 455, 605, 715, 847, 1001, 1573, 4235, 4751, 5005, 7865, 11011, 23755, 33257, 52261, 55055, 61763, 166285, 261305, 308815, 365827, 432341, 574871, 679393, 1829135, 2161705, 2874355, 3396965, 4024097, 4755751, 7473323, 20120485, 23778755, 37366615, 52313261, 261566305]

約数ペア:

[(1, 261566305), (5, 52313261), (7, 37366615), (11, 23778755), (13, 20120485), (35, 7473323), (55, 4755751), (65, 4024097), (77, 3396965), (91, 2874355), (121, 2161705), (143, 1829135), (385, 679393), (455, 574871), (605, 432341), (715, 365827), (847, 308815), (1001, 261305), (1573, 166285), (4235, 61763), (4751, 55055), (5005, 52261), (7865, 33257), (11011, 23755)]