18891981

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{521}}^1$

素因数の和:626

約数の個数: 32

約数和(自身を含む): 30067200

約数和(自身を除く): 11175219

約数列:

[1, 3, 9, 17, 27, 51, 79, 153, 237, 459, 521, 711, 1343, 1563, 2133, 4029, 4689, 8857, 12087, 14067, 26571, 36261, 41159, 79713, 123477, 239139, 370431, 699703, 1111293, 2099109, 6297327, 18891981]

約数ペア:

[(1, 18891981), (3, 6297327), (9, 2099109), (17, 1111293), (27, 699703), (51, 370431), (79, 239139), (153, 123477), (237, 79713), (459, 41159), (521, 36261), (711, 26571), (1343, 14067), (1563, 12087), (2133, 8857), (4029, 4689)]