21290919

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{1889}}^1$

素因数の和:1939

約数の個数: 24

約数和(自身を含む): 32492880

約数和(自身を除く): 11201961

約数列:

[1, 3, 13, 17, 39, 51, 221, 289, 663, 867, 1889, 3757, 5667, 11271, 24557, 32113, 73671, 96339, 417469, 545921, 1252407, 1637763, 7096973, 21290919]

約数ペア:

[(1, 21290919), (3, 7096973), (13, 1637763), (17, 1252407), (39, 545921), (51, 417469), (221, 96339), (289, 73671), (663, 32113), (867, 24557), (1889, 11271), (3757, 5667)]