21178989

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{20113}}^1$

素因数の和:20138

約数の個数: 20

約数和(自身を含む): 34073116

約数和(自身を除く): 12894127

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 20113, 60339, 181017, 261469, 543051, 784407, 1629153, 2353221, 7059663, 21178989]

約数ペア:

[(1, 21178989), (3, 7059663), (9, 2353221), (13, 1629153), (27, 784407), (39, 543051), (81, 261469), (117, 181017), (351, 60339), (1053, 20113)]