21000908032

素因数分解:

$2^8\times {\mathrm{13}}^2\times {\mathrm{421}}^1\times {\mathrm{1153}}^1$

素因数の和:1616

約数の個数: 108

約数和(自身を含む): 45539708844

約数和(自身を除く): 24538800812

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 128, 169, 208, 256, 338, 416, 421, 676, 832, 842, 1153, 1352, 1664, 1684, 2306, 2704, 3328, 3368, 4612, 5408, 5473, 6736, 9224, 10816, 10946, 13472, 14989, 18448, 21632, 21892, 26944, 29978, 36896, 43264, 43784, 53888, 59956, 71149, 73792, 87568, 107776, 119912, 142298, 147584, 175136, 194857, 239824, 284596, 295168, 350272, 389714, 479648, 485413, 569192, 700544, 779428, 959296, 970826, 1138384, 1401088, 1558856, 1918592, 1941652, 2276768, 3117712, 3837184, 3883304, 4553536, 6235424, 6310369, 7766608, 9107072, 12470848, 12620738, 15533216, 18214144, 24941696, 25241476, 31066432, 49883392, 50482952, 62132864, 82034797, 100965904, 124265728, 164069594, 201931808, 328139188, 403863616, 656278376, 807727232, 1312556752, 1615454464, 2625113504, 5250227008, 10500454016, 21000908032]

約数ペア:

[(1, 21000908032), (2, 10500454016), (4, 5250227008), (8, 2625113504), (13, 1615454464), (16, 1312556752), (26, 807727232), (32, 656278376), (52, 403863616), (64, 328139188), (104, 201931808), (128, 164069594), (169, 124265728), (208, 100965904), (256, 82034797), (338, 62132864), (416, 50482952), (421, 49883392), (676, 31066432), (832, 25241476), (842, 24941696), (1153, 18214144), (1352, 15533216), (1664, 12620738), (1684, 12470848), (2306, 9107072), (2704, 7766608), (3328, 6310369), (3368, 6235424), (4612, 4553536), (5408, 3883304), (5473, 3837184), (6736, 3117712), (9224, 2276768), (10816, 1941652), (10946, 1918592), (13472, 1558856), (14989, 1401088), (18448, 1138384), (21632, 970826), (21892, 959296), (26944, 779428), (29978, 700544), (36896, 569192), (43264, 485413), (43784, 479648), (53888, 389714), (59956, 350272), (71149, 295168), (73792, 284596), (87568, 239824), (107776, 194857), (119912, 175136), (142298, 147584)]