21208561919

素因数分解:

${\mathrm{19}}^2\times {\mathrm{911}}^1\times {\mathrm{64489}}^1$

素因数の和:65438

約数の個数: 12

約数和(自身を含む): 22408469280

約数和(自身を除く): 1199907361

約数列:

[1, 19, 361, 911, 17309, 64489, 328871, 1225291, 23280529, 58749479, 1116240101, 21208561919]

約数ペア:

[(1, 21208561919), (19, 1116240101), (361, 58749479), (911, 23280529), (17309, 1225291), (64489, 328871)]