20465720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{193}}^1\times {\mathrm{241}}^1$

素因数の和:456

約数の個数: 64

約数和(自身を含む): 50703840

約数和(自身を除く): 30238120

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 193, 220, 241, 386, 440, 482, 772, 964, 965, 1205, 1544, 1928, 1930, 2123, 2410, 2651, 3860, 4246, 4820, 5302, 7720, 8492, 9640, 10604, 10615, 13255, 16984, 21208, 21230, 26510, 42460, 46513, 53020, 84920, 93026, 106040, 186052, 232565, 372104, 465130, 511643, 930260, 1023286, 1860520, 2046572, 2558215, 4093144, 5116430, 10232860, 20465720]

約数ペア:

[(1, 20465720), (2, 10232860), (4, 5116430), (5, 4093144), (8, 2558215), (10, 2046572), (11, 1860520), (20, 1023286), (22, 930260), (40, 511643), (44, 465130), (55, 372104), (88, 232565), (110, 186052), (193, 106040), (220, 93026), (241, 84920), (386, 53020), (440, 46513), (482, 42460), (772, 26510), (964, 21230), (965, 21208), (1205, 16984), (1544, 13255), (1928, 10615), (1930, 10604), (2123, 9640), (2410, 8492), (2651, 7720), (3860, 5302), (4246, 4820)]