20898081

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{367}}^1$

素因数の和:435

約数の個数: 40

約数和(自身を含む): 33841280

約数和(自身を除く): 12943199

約数列:

[1, 3, 9, 19, 27, 37, 57, 81, 111, 171, 333, 367, 513, 703, 999, 1101, 1539, 2109, 2997, 3303, 6327, 6973, 9909, 13579, 18981, 20919, 29727, 40737, 56943, 62757, 122211, 188271, 258001, 366633, 564813, 774003, 1099899, 2322009, 6966027, 20898081]

約数ペア:

[(1, 20898081), (3, 6966027), (9, 2322009), (19, 1099899), (27, 774003), (37, 564813), (57, 366633), (81, 258001), (111, 188271), (171, 122211), (333, 62757), (367, 56943), (513, 40737), (703, 29727), (999, 20919), (1101, 18981), (1539, 13579), (2109, 9909), (2997, 6973), (3303, 6327)]