18820989

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{211}}^1$

素因数の和:298

約数の個数: 48

約数和(自身を含む): 32145984

約数和(自身を除く): 13324995

約数列:

[1, 3, 9, 11, 17, 33, 51, 53, 99, 153, 159, 187, 211, 477, 561, 583, 633, 901, 1683, 1749, 1899, 2321, 2703, 3587, 5247, 6963, 8109, 9911, 10761, 11183, 20889, 29733, 32283, 33549, 39457, 89199, 100647, 118371, 123013, 190111, 355113, 369039, 570333, 1107117, 1710999, 2091221, 6273663, 18820989]

約数ペア:

[(1, 18820989), (3, 6273663), (9, 2091221), (11, 1710999), (17, 1107117), (33, 570333), (51, 369039), (53, 355113), (99, 190111), (153, 123013), (159, 118371), (187, 100647), (211, 89199), (477, 39457), (561, 33549), (583, 32283), (633, 29733), (901, 20889), (1683, 11183), (1749, 10761), (1899, 9911), (2321, 8109), (2703, 6963), (3587, 5247)]