21472581

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{233}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 33022080

約数和(自身を除く): 11549499

約数列:

[1, 3, 13, 17, 39, 51, 139, 221, 233, 417, 663, 699, 1807, 2363, 3029, 3961, 5421, 7089, 9087, 11883, 30719, 32387, 51493, 92157, 97161, 154479, 421031, 550579, 1263093, 1651737, 7157527, 21472581]

約数ペア:

[(1, 21472581), (3, 7157527), (13, 1651737), (17, 1263093), (39, 550579), (51, 421031), (139, 154479), (221, 97161), (233, 92157), (417, 51493), (663, 32387), (699, 30719), (1807, 11883), (2363, 9087), (3029, 7089), (3961, 5421)]