21291239668

素因数分解:

$2^2\times {\mathrm{89}}^1\times {\mathrm{431}}^1\times {\mathrm{138763}}^1$

素因数の和:139287

約数の個数: 24

約数和(自身を含む): 37766010240

約数和(自身を除く): 16474770572

約数列:

[1, 2, 4, 89, 178, 356, 431, 862, 1724, 38359, 76718, 138763, 153436, 277526, 555052, 12349907, 24699814, 49399628, 59806853, 119613706, 239227412, 5322809917, 10645619834, 21291239668]

約数ペア:

[(1, 21291239668), (2, 10645619834), (4, 5322809917), (89, 239227412), (178, 119613706), (356, 59806853), (431, 49399628), (862, 24699814), (1724, 12349907), (38359, 555052), (76718, 277526), (138763, 153436)]