199920721

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{199721}}^1$

素因数の和:199752

約数の個数: 16

約数和(自身を含む): 268426368

約数和(自身を除く): 68505647

約数列:

[1, 7, 11, 13, 77, 91, 143, 1001, 199721, 1398047, 2196931, 2596373, 15378517, 18174611, 28560103, 199920721]

約数ペア:

[(1, 199920721), (7, 28560103), (11, 18174611), (13, 15378517), (77, 2596373), (91, 2196931), (143, 1398047), (1001, 199721)]