20816692

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{400321}}^1$

素因数の和:400338

約数の個数: 12

約数和(自身を含む): 39231556

約数和(自身を除く): 18414864

約数列:

[1, 2, 4, 13, 26, 52, 400321, 800642, 1601284, 5204173, 10408346, 20816692]

約数ペア:

[(1, 20816692), (2, 10408346), (4, 5204173), (13, 1601284), (26, 800642), (52, 400321)]