21666128

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{257}}^1\times {\mathrm{479}}^1$

素因数の和:755

約数の個数: 40

約数和(自身を含む): 46068480

約数和(自身を除く): 24402352

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 257, 479, 514, 958, 1028, 1916, 2056, 2827, 3832, 4112, 5269, 5654, 7664, 10538, 11308, 21076, 22616, 42152, 45232, 84304, 123103, 246206, 492412, 984824, 1354133, 1969648, 2708266, 5416532, 10833064, 21666128]

約数ペア:

[(1, 21666128), (2, 10833064), (4, 5416532), (8, 2708266), (11, 1969648), (16, 1354133), (22, 984824), (44, 492412), (88, 246206), (176, 123103), (257, 84304), (479, 45232), (514, 42152), (958, 22616), (1028, 21076), (1916, 11308), (2056, 10538), (2827, 7664), (3832, 5654), (4112, 5269)]