20515209

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{97}}^1$

素因数の和:170

約数の個数: 64

約数和(自身を含む): 35562240

約数和(自身を除く): 15047031

約数列:

[1, 3, 11, 13, 17, 29, 33, 39, 51, 87, 97, 143, 187, 221, 291, 319, 377, 429, 493, 561, 663, 957, 1067, 1131, 1261, 1479, 1649, 2431, 2813, 3201, 3783, 4147, 4947, 5423, 6409, 7293, 8439, 12441, 13871, 16269, 18139, 19227, 21437, 30943, 36569, 41613, 47821, 54417, 64311, 70499, 92829, 109707, 143463, 211497, 235807, 402259, 526031, 621673, 707421, 1206777, 1578093, 1865019, 6838403, 20515209]

約数ペア:

[(1, 20515209), (3, 6838403), (11, 1865019), (13, 1578093), (17, 1206777), (29, 707421), (33, 621673), (39, 526031), (51, 402259), (87, 235807), (97, 211497), (143, 143463), (187, 109707), (221, 92829), (291, 70499), (319, 64311), (377, 54417), (429, 47821), (493, 41613), (561, 36569), (663, 30943), (957, 21437), (1067, 19227), (1131, 18139), (1261, 16269), (1479, 13871), (1649, 12441), (2431, 8439), (2813, 7293), (3201, 6409), (3783, 5423), (4147, 4947)]