20704508

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{499}}^1$

素因数の和:578

約数の個数: 48

約数和(自身を含む): 42336000

約数和(自身を除く): 21631492

約数列:

[1, 2, 4, 11, 22, 23, 41, 44, 46, 82, 92, 164, 253, 451, 499, 506, 902, 943, 998, 1012, 1804, 1886, 1996, 3772, 5489, 10373, 10978, 11477, 20459, 20746, 21956, 22954, 40918, 41492, 45908, 81836, 126247, 225049, 252494, 450098, 470557, 504988, 900196, 941114, 1882228, 5176127, 10352254, 20704508]

約数ペア:

[(1, 20704508), (2, 10352254), (4, 5176127), (11, 1882228), (22, 941114), (23, 900196), (41, 504988), (44, 470557), (46, 450098), (82, 252494), (92, 225049), (164, 126247), (253, 81836), (451, 45908), (499, 41492), (506, 40918), (902, 22954), (943, 21956), (998, 20746), (1012, 20459), (1804, 11477), (1886, 10978), (1996, 10373), (3772, 5489)]