20990866

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1\times {\mathrm{137}}^1$

素因数の和:306

約数の個数: 32

約数和(自身を含む): 35054208

約数和(自身を除く): 14063342

約数列:

[1, 2, 13, 26, 71, 83, 137, 142, 166, 274, 923, 1079, 1781, 1846, 2158, 3562, 5893, 9727, 11371, 11786, 19454, 22742, 76609, 126451, 147823, 153218, 252902, 295646, 807341, 1614682, 10495433, 20990866]

約数ペア:

[(1, 20990866), (2, 10495433), (13, 1614682), (26, 807341), (71, 295646), (83, 252902), (137, 153218), (142, 147823), (166, 126451), (274, 76609), (923, 22742), (1079, 19454), (1781, 11786), (1846, 11371), (2158, 9727), (3562, 5893)]