21665589

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{239}}^1$

素因数の和:361

約数の個数: 32

約数和(自身を含む): 32901120

約数和(自身を除く): 11235531

約数列:

[1, 3, 11, 33, 41, 67, 123, 201, 239, 451, 717, 737, 1353, 2211, 2629, 2747, 7887, 8241, 9799, 16013, 29397, 30217, 48039, 90651, 107789, 176143, 323367, 528429, 656533, 1969599, 7221863, 21665589]

約数ペア:

[(1, 21665589), (3, 7221863), (11, 1969599), (33, 656533), (41, 528429), (67, 323367), (123, 176143), (201, 107789), (239, 90651), (451, 48039), (717, 30217), (737, 29397), (1353, 16013), (2211, 9799), (2629, 8241), (2747, 7887)]