20581239

素因数分解:

$3^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{7717}}^1$

素因数の和:7854

約数の個数: 16

約数和(自身を含む): 31612928

約数和(自身を除く): 11031689

約数列:

[1, 3, 7, 21, 127, 381, 889, 2667, 7717, 23151, 54019, 162057, 980059, 2940177, 6860413, 20581239]

約数ペア:

[(1, 20581239), (3, 6860413), (7, 2940177), (21, 980059), (127, 162057), (381, 54019), (889, 23151), (2667, 7717)]