18993987

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{19013}}^1$

素因数の和:19059

約数の個数: 16

約数和(自身を含む): 28901280

約数和(自身を除く): 9907293

約数列:

[1, 3, 9, 27, 37, 111, 333, 999, 19013, 57039, 171117, 513351, 703481, 2110443, 6331329, 18993987]

約数ペア:

[(1, 18993987), (3, 6331329), (9, 2110443), (27, 703481), (37, 513351), (111, 171117), (333, 57039), (999, 19013)]