21155589

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{1987}}^1$

素因数の和:2026

約数の個数: 36

約数和(自身を含む): 37835616

約数和(自身を除く): 16680027

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 169, 273, 507, 819, 1183, 1521, 1987, 3549, 5961, 10647, 13909, 17883, 25831, 41727, 77493, 125181, 180817, 232479, 335803, 542451, 1007409, 1627353, 2350621, 3022227, 7051863, 21155589]

約数ペア:

[(1, 21155589), (3, 7051863), (7, 3022227), (9, 2350621), (13, 1627353), (21, 1007409), (39, 542451), (63, 335803), (91, 232479), (117, 180817), (169, 125181), (273, 77493), (507, 41727), (819, 25831), (1183, 17883), (1521, 13909), (1987, 10647), (3549, 5961)]