19911145

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{6761}}^1$

素因数の和:6816

約数の個数: 16

約数和(自身を含む): 25966080

約数和(自身を除く): 6054935

約数列:

[1, 5, 19, 31, 95, 155, 589, 2945, 6761, 33805, 128459, 209591, 642295, 1047955, 3982229, 19911145]

約数ペア:

[(1, 19911145), (5, 3982229), (19, 1047955), (31, 642295), (95, 209591), (155, 128459), (589, 33805), (2945, 6761)]