18972009

素因数分解:

$3^3\times 7^1\times {\mathrm{37}}^1\times {\mathrm{2713}}^1$

素因数の和:2766

約数の個数: 32

約数和(自身を含む): 33002240

約数和(自身を除く): 14030231

約数列:

[1, 3, 7, 9, 21, 27, 37, 63, 111, 189, 259, 333, 777, 999, 2331, 2713, 6993, 8139, 18991, 24417, 56973, 73251, 100381, 170919, 301143, 512757, 702667, 903429, 2108001, 2710287, 6324003, 18972009]

約数ペア:

[(1, 18972009), (3, 6324003), (7, 2710287), (9, 2108001), (21, 903429), (27, 702667), (37, 512757), (63, 301143), (111, 170919), (189, 100381), (259, 73251), (333, 56973), (777, 24417), (999, 18991), (2331, 8139), (2713, 6993)]