20962719

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{257}}^1$

素因数の和:341

約数の個数: 40

約数和(自身を含む): 33715440

約数和(自身を除く): 12752721

約数列:

[1, 3, 9, 19, 27, 53, 57, 81, 159, 171, 257, 477, 513, 771, 1007, 1431, 1539, 2313, 3021, 4293, 4883, 6939, 9063, 13621, 14649, 20817, 27189, 40863, 43947, 81567, 122589, 131841, 258799, 367767, 395523, 776397, 1103301, 2329191, 6987573, 20962719]

約数ペア:

[(1, 20962719), (3, 6987573), (9, 2329191), (19, 1103301), (27, 776397), (53, 395523), (57, 367767), (81, 258799), (159, 131841), (171, 122589), (257, 81567), (477, 43947), (513, 40863), (771, 27189), (1007, 20817), (1431, 14649), (1539, 13621), (2313, 9063), (3021, 6939), (4293, 4883)]