16985997

素因数分解:

$3^3\times 7^2\times {\mathrm{37}}^1\times {\mathrm{347}}^1$

素因数の和:407

約数の個数: 48

約数和(自身を含む): 30150720

約数和(自身を除く): 13164723

約数列:

[1, 3, 7, 9, 21, 27, 37, 49, 63, 111, 147, 189, 259, 333, 347, 441, 777, 999, 1041, 1323, 1813, 2331, 2429, 3123, 5439, 6993, 7287, 9369, 12839, 16317, 17003, 21861, 38517, 48951, 51009, 65583, 89873, 115551, 153027, 269619, 346653, 459081, 629111, 808857, 1887333, 2426571, 5661999, 16985997]

約数ペア:

[(1, 16985997), (3, 5661999), (7, 2426571), (9, 1887333), (21, 808857), (27, 629111), (37, 459081), (49, 346653), (63, 269619), (111, 153027), (147, 115551), (189, 89873), (259, 65583), (333, 51009), (347, 48951), (441, 38517), (777, 21861), (999, 17003), (1041, 16317), (1323, 12839), (1813, 9369), (2331, 7287), (2429, 6993), (3123, 5439)]