20978493

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{439}}^1\times {\mathrm{937}}^1$

素因数の和:1396

約数の個数: 16

約数和(自身を含む): 29715840

約数和(自身を除く): 8737347

約数列:

[1, 3, 17, 51, 439, 937, 1317, 2811, 7463, 15929, 22389, 47787, 411343, 1234029, 6992831, 20978493]

約数ペア:

[(1, 20978493), (3, 6992831), (17, 1234029), (51, 411343), (439, 47787), (937, 22389), (1317, 15929), (2811, 7463)]