21012095

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:275

約数の個数: 32

約数和(自身を含む): 28667520

約数和(自身を除く): 7655425

約数列:

[1, 5, 13, 29, 65, 71, 145, 157, 355, 377, 785, 923, 1885, 2041, 2059, 4553, 4615, 10205, 10295, 11147, 22765, 26767, 55735, 59189, 133835, 144911, 295945, 323263, 724555, 1616315, 4202419, 21012095]

約数ペア:

[(1, 21012095), (5, 4202419), (13, 1616315), (29, 724555), (65, 323263), (71, 295945), (145, 144911), (157, 133835), (355, 59189), (377, 55735), (785, 26767), (923, 22765), (1885, 11147), (2041, 10295), (2059, 10205), (4553, 4615)]