321781815

素因数分解:

$3^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{263}}^1$

素因数の和:355

約数の個数: 96

約数和(自身を含む): 622702080

約数和(自身を除く): 300920265

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 53, 57, 81, 95, 135, 159, 171, 243, 263, 265, 285, 405, 477, 513, 789, 795, 855, 1007, 1215, 1315, 1431, 1539, 2367, 2385, 2565, 3021, 3945, 4293, 4617, 4997, 5035, 7101, 7155, 7695, 9063, 11835, 12879, 13939, 14991, 15105, 21303, 21465, 23085, 24985, 27189, 35505, 41817, 44973, 45315, 63909, 64395, 69695, 74955, 81567, 106515, 125451, 134919, 135945, 209085, 224865, 244701, 264841, 319545, 376353, 404757, 407835, 627255, 674595, 794523, 1129059, 1214271, 1223505, 1324205, 1881765, 2023785, 2383569, 3387177, 3972615, 5645295, 6071355, 7150707, 11917845, 16935885, 21452121, 35753535, 64356363, 107260605, 321781815]

約数ペア:

[(1, 321781815), (3, 107260605), (5, 64356363), (9, 35753535), (15, 21452121), (19, 16935885), (27, 11917845), (45, 7150707), (53, 6071355), (57, 5645295), (81, 3972615), (95, 3387177), (135, 2383569), (159, 2023785), (171, 1881765), (243, 1324205), (263, 1223505), (265, 1214271), (285, 1129059), (405, 794523), (477, 674595), (513, 627255), (789, 407835), (795, 404757), (855, 376353), (1007, 319545), (1215, 264841), (1315, 244701), (1431, 224865), (1539, 209085), (2367, 135945), (2385, 134919), (2565, 125451), (3021, 106515), (3945, 81567), (4293, 74955), (4617, 69695), (4997, 64395), (5035, 63909), (7101, 45315), (7155, 44973), (7695, 41817), (9063, 35505), (11835, 27189), (12879, 24985), (13939, 23085), (14991, 21465), (15105, 21303)]