20287323

素因数分解:

$3^2\times 7^2\times {\mathrm{179}}^1\times {\mathrm{257}}^1$

素因数の和:456

約数の個数: 36

約数和(自身を含む): 34412040

約数和(自身を除く): 14124717

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 179, 257, 441, 537, 771, 1253, 1611, 1799, 2313, 3759, 5397, 8771, 11277, 12593, 16191, 26313, 37779, 46003, 78939, 113337, 138009, 322021, 414027, 966063, 2254147, 2898189, 6762441, 20287323]

約数ペア:

[(1, 20287323), (3, 6762441), (7, 2898189), (9, 2254147), (21, 966063), (49, 414027), (63, 322021), (147, 138009), (179, 113337), (257, 78939), (441, 46003), (537, 37779), (771, 26313), (1253, 16191), (1611, 12593), (1799, 11277), (2313, 8771), (3759, 5397)]