215688319

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{121789}}^1$

素因数の和:121830

約数の個数: 16

約数和(自身を含む): 280604160

約数和(自身を除く): 64915841

約数列:

[1, 7, 11, 23, 77, 161, 253, 1771, 121789, 852523, 1339679, 2801147, 9377753, 19608029, 30812617, 215688319]

約数ペア:

[(1, 215688319), (7, 30812617), (11, 19608029), (23, 9377753), (77, 2801147), (161, 1339679), (253, 852523), (1771, 121789)]