21179637

素因数分解:

$3^6\times {\mathrm{17}}^1\times {\mathrm{1709}}^1$

素因数の和:1744

約数の個数: 28

約数和(自身を含む): 33642540

約数和(自身を除く): 12462903

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 243, 459, 729, 1377, 1709, 4131, 5127, 12393, 15381, 29053, 46143, 87159, 138429, 261477, 415287, 784431, 1245861, 2353293, 7059879, 21179637]

約数ペア:

[(1, 21179637), (3, 7059879), (9, 2353293), (17, 1245861), (27, 784431), (51, 415287), (81, 261477), (153, 138429), (243, 87159), (459, 46143), (729, 29053), (1377, 15381), (1709, 12393), (4131, 5127)]