20421765

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{4987}}^1$

素因数の和:5018

約数の個数: 48

約数和(自身を含む): 43575168

約数和(自身を除く): 23153403

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 35, 39, 45, 63, 65, 91, 105, 117, 195, 273, 315, 455, 585, 819, 1365, 4095, 4987, 14961, 24935, 34909, 44883, 64831, 74805, 104727, 174545, 194493, 224415, 314181, 324155, 453817, 523635, 583479, 972465, 1361451, 1570905, 2269085, 2917395, 4084353, 6807255, 20421765]

約数ペア:

[(1, 20421765), (3, 6807255), (5, 4084353), (7, 2917395), (9, 2269085), (13, 1570905), (15, 1361451), (21, 972465), (35, 583479), (39, 523635), (45, 453817), (63, 324155), (65, 314181), (91, 224415), (105, 194493), (117, 174545), (195, 104727), (273, 74805), (315, 64831), (455, 44883), (585, 34909), (819, 24935), (1365, 14961), (4095, 4987)]