21000252728

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1123}}^1\times {\mathrm{1511}}^1$

素因数の和:2677

約数の個数: 128

約数和(自身を含む): 51392517120

約数和(自身を除く): 30392264392

約数列:

[1, 2, 4, 7, 8, 13, 14, 17, 26, 28, 34, 52, 56, 68, 91, 104, 119, 136, 182, 221, 238, 364, 442, 476, 728, 884, 952, 1123, 1511, 1547, 1768, 2246, 3022, 3094, 4492, 6044, 6188, 7861, 8984, 10577, 12088, 12376, 14599, 15722, 19091, 19643, 21154, 25687, 29198, 31444, 38182, 39286, 42308, 51374, 58396, 62888, 76364, 78572, 84616, 102193, 102748, 116792, 133637, 137501, 152728, 157144, 179809, 204386, 205496, 248183, 267274, 275002, 333931, 359618, 408772, 496366, 534548, 550004, 667862, 719236, 817544, 992732, 1069096, 1100008, 1335724, 1438472, 1696853, 1737281, 1985464, 2337517, 2671448, 3393706, 3474562, 4675034, 6787412, 6949124, 9350068, 11877971, 13574824, 13898248, 18700136, 22059089, 23755942, 28846501, 44118178, 47511884, 57693002, 88236356, 95023768, 115386004, 154413623, 176472712, 201925507, 230772008, 308827246, 375004513, 403851014, 617654492, 750009026, 807702028, 1235308984, 1500018052, 1615404056, 2625031591, 3000036104, 5250063182, 10500126364, 21000252728]

約数ペア:

[(1, 21000252728), (2, 10500126364), (4, 5250063182), (7, 3000036104), (8, 2625031591), (13, 1615404056), (14, 1500018052), (17, 1235308984), (26, 807702028), (28, 750009026), (34, 617654492), (52, 403851014), (56, 375004513), (68, 308827246), (91, 230772008), (104, 201925507), (119, 176472712), (136, 154413623), (182, 115386004), (221, 95023768), (238, 88236356), (364, 57693002), (442, 47511884), (476, 44118178), (728, 28846501), (884, 23755942), (952, 22059089), (1123, 18700136), (1511, 13898248), (1547, 13574824), (1768, 11877971), (2246, 9350068), (3022, 6949124), (3094, 6787412), (4492, 4675034), (6044, 3474562), (6188, 3393706), (7861, 2671448), (8984, 2337517), (10577, 1985464), (12088, 1737281), (12376, 1696853), (14599, 1438472), (15722, 1335724), (19091, 1100008), (19643, 1069096), (21154, 992732), (25687, 817544), (29198, 719236), (31444, 667862), (38182, 550004), (39286, 534548), (42308, 496366), (51374, 408772), (58396, 359618), (62888, 333931), (76364, 275002), (78572, 267274), (84616, 248183), (102193, 205496), (102748, 204386), (116792, 179809), (133637, 157144), (137501, 152728)]