20918007

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1381}}^1$

素因数の和:1421

約数の個数: 40

約数和(自身を含む): 36119952

約数和(自身を除く): 15201945

約数列:

[1, 3, 9, 11, 17, 27, 33, 51, 81, 99, 153, 187, 297, 459, 561, 891, 1377, 1381, 1683, 4143, 5049, 12429, 15147, 15191, 23477, 37287, 45573, 70431, 111861, 136719, 211293, 258247, 410157, 633879, 774741, 1230471, 1901637, 2324223, 6972669, 20918007]

約数ペア:

[(1, 20918007), (3, 6972669), (9, 2324223), (11, 1901637), (17, 1230471), (27, 774741), (33, 633879), (51, 410157), (81, 258247), (99, 211293), (153, 136719), (187, 111861), (297, 70431), (459, 45573), (561, 37287), (891, 23477), (1377, 15191), (1381, 15147), (1683, 12429), (4143, 5049)]