21455368

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{479}}^1\times {\mathrm{509}}^1$

素因数の和:1005

約数の個数: 32

約数和(自身を含む): 44064000

約数和(自身を除く): 22608632

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 479, 509, 958, 1018, 1916, 2036, 3832, 4072, 5269, 5599, 10538, 11198, 21076, 22396, 42152, 44792, 243811, 487622, 975244, 1950488, 2681921, 5363842, 10727684, 21455368]

約数ペア:

[(1, 21455368), (2, 10727684), (4, 5363842), (8, 2681921), (11, 1950488), (22, 975244), (44, 487622), (88, 243811), (479, 44792), (509, 42152), (958, 22396), (1018, 21076), (1916, 11198), (2036, 10538), (3832, 5599), (4072, 5269)]