19400913

素因数分解:

$3^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1$

素因数の和:127

約数の個数: 72

約数和(自身を含む): 35479080

約数和(自身を除く): 16078167

約数列:

[1, 3, 7, 9, 21, 29, 37, 41, 49, 63, 87, 111, 123, 147, 203, 259, 261, 287, 333, 369, 441, 609, 777, 861, 1073, 1189, 1421, 1517, 1813, 1827, 2009, 2331, 2583, 3219, 3567, 4263, 4551, 5439, 6027, 7511, 8323, 9657, 10619, 10701, 12789, 13653, 16317, 18081, 22533, 24969, 31857, 43993, 52577, 58261, 67599, 74333, 74907, 95571, 131979, 157731, 174783, 222999, 307951, 395937, 473193, 524349, 668997, 923853, 2155657, 2771559, 6466971, 19400913]

約数ペア:

[(1, 19400913), (3, 6466971), (7, 2771559), (9, 2155657), (21, 923853), (29, 668997), (37, 524349), (41, 473193), (49, 395937), (63, 307951), (87, 222999), (111, 174783), (123, 157731), (147, 131979), (203, 95571), (259, 74907), (261, 74333), (287, 67599), (333, 58261), (369, 52577), (441, 43993), (609, 31857), (777, 24969), (861, 22533), (1073, 18081), (1189, 16317), (1421, 13653), (1517, 12789), (1813, 10701), (1827, 10619), (2009, 9657), (2331, 8323), (2583, 7511), (3219, 6027), (3567, 5439), (4263, 4551)]