21000918141

素因数分解:

$3^3\times 7^1\times {\mathrm{107}}^1\times {\mathrm{191}}^1\times {\mathrm{5437}}^1$

素因数の和:5751

約数の個数: 64

約数和(自身を含む): 36083957760

約数和(自身を除く): 15083039619

約数列:

[1, 3, 7, 9, 21, 27, 63, 107, 189, 191, 321, 573, 749, 963, 1337, 1719, 2247, 2889, 4011, 5157, 5437, 6741, 12033, 16311, 20223, 20437, 36099, 38059, 48933, 61311, 114177, 143059, 146799, 183933, 342531, 429177, 551799, 581759, 1027593, 1038467, 1287531, 1745277, 3115401, 3862593, 4072313, 5235831, 7269269, 9346203, 12216939, 15707493, 21807807, 28038609, 36650817, 65423421, 109952451, 111115969, 196270263, 333347907, 777811783, 1000043721, 2333435349, 3000131163, 7000306047, 21000918141]

約数ペア:

[(1, 21000918141), (3, 7000306047), (7, 3000131163), (9, 2333435349), (21, 1000043721), (27, 777811783), (63, 333347907), (107, 196270263), (189, 111115969), (191, 109952451), (321, 65423421), (573, 36650817), (749, 28038609), (963, 21807807), (1337, 15707493), (1719, 12216939), (2247, 9346203), (2889, 7269269), (4011, 5235831), (5157, 4072313), (5437, 3862593), (6741, 3115401), (12033, 1745277), (16311, 1287531), (20223, 1038467), (20437, 1027593), (36099, 581759), (38059, 551799), (48933, 429177), (61311, 342531), (114177, 183933), (143059, 146799)]