16991425

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{137}}^1$

素因数の和:210

約数の個数: 36

約数和(自身を含む): 23896908

約数和(自身を除く): 6905483

約数列:

[1, 5, 11, 25, 41, 55, 121, 137, 205, 275, 451, 605, 685, 1025, 1507, 2255, 3025, 3425, 4961, 5617, 7535, 11275, 16577, 24805, 28085, 37675, 61787, 82885, 124025, 140425, 308935, 414425, 679657, 1544675, 3398285, 16991425]

約数ペア:

[(1, 16991425), (5, 3398285), (11, 1544675), (25, 679657), (41, 414425), (55, 308935), (121, 140425), (137, 124025), (205, 82885), (275, 61787), (451, 37675), (605, 28085), (685, 24805), (1025, 16577), (1507, 11275), (2255, 7535), (3025, 5617), (3425, 4961)]