20720403

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{53}}^1\times {\mathrm{359}}^1$

素因数の和:440

約数の個数: 36

約数和(自身を含む): 33611760

約数和(自身を除く): 12891357

約数列:

[1, 3, 9, 11, 33, 53, 99, 121, 159, 359, 363, 477, 583, 1077, 1089, 1749, 3231, 3949, 5247, 6413, 11847, 19027, 19239, 35541, 43439, 57081, 57717, 130317, 171243, 209297, 390951, 627891, 1883673, 2302267, 6906801, 20720403]

約数ペア:

[(1, 20720403), (3, 6906801), (9, 2302267), (11, 1883673), (33, 627891), (53, 390951), (99, 209297), (121, 171243), (159, 130317), (359, 57717), (363, 57081), (477, 43439), (583, 35541), (1077, 19239), (1089, 19027), (1749, 11847), (3231, 6413), (3949, 5247)]