21404368

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{587}}^1$

素因数の和:691

約数の個数: 40

約数和(自身を含む): 43309728

約数和(自身を除く): 21905360

約数列:

[1, 2, 4, 8, 16, 43, 53, 86, 106, 172, 212, 344, 424, 587, 688, 848, 1174, 2279, 2348, 4558, 4696, 9116, 9392, 18232, 25241, 31111, 36464, 50482, 62222, 100964, 124444, 201928, 248888, 403856, 497776, 1337773, 2675546, 5351092, 10702184, 21404368]

約数ペア:

[(1, 21404368), (2, 10702184), (4, 5351092), (8, 2675546), (16, 1337773), (43, 497776), (53, 403856), (86, 248888), (106, 201928), (172, 124444), (212, 100964), (344, 62222), (424, 50482), (587, 36464), (688, 31111), (848, 25241), (1174, 18232), (2279, 9392), (2348, 9116), (4558, 4696)]