21308139

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{353}}^2$

素因数の和:731

約数の個数: 18

約数和(自身を含む): 32490380

約数和(自身を除く): 11182241

約数列:

[1, 3, 9, 19, 57, 171, 353, 1059, 3177, 6707, 20121, 60363, 124609, 373827, 1121481, 2367571, 7102713, 21308139]

約数ペア:

[(1, 21308139), (3, 7102713), (9, 2367571), (19, 1121481), (57, 373827), (171, 124609), (353, 60363), (1059, 20121), (3177, 6707)]