20986028

素因数分解:

$2^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{32587}}^1$

素因数の和:32621

約数の個数: 24

約数和(自身を含む): 43798272

約数和(自身を除く): 22812244

約数列:

[1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644, 32587, 65174, 130348, 228109, 456218, 749501, 912436, 1499002, 2998004, 5246507, 10493014, 20986028]

約数ペア:

[(1, 20986028), (2, 10493014), (4, 5246507), (7, 2998004), (14, 1499002), (23, 912436), (28, 749501), (46, 456218), (92, 228109), (161, 130348), (322, 65174), (644, 32587)]