21072265

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{173}}^1\times {\mathrm{1433}}^1$

素因数の和:1628

約数の個数: 16

約数和(自身を含む): 26947728

約数和(自身を除く): 5875463

約数列:

[1, 5, 17, 85, 173, 865, 1433, 2941, 7165, 14705, 24361, 121805, 247909, 1239545, 4214453, 21072265]

約数ペア:

[(1, 21072265), (5, 4214453), (17, 1239545), (85, 247909), (173, 121805), (865, 24361), (1433, 14705), (2941, 7165)]