20457981

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{263}}^1$

素因数の和:382

約数の個数: 32

約数和(自身を含む): 31595520

約数和(自身を除く): 11137539

約数列:

[1, 3, 9, 27, 43, 67, 129, 201, 263, 387, 603, 789, 1161, 1809, 2367, 2881, 7101, 8643, 11309, 17621, 25929, 33927, 52863, 77787, 101781, 158589, 305343, 475767, 757703, 2273109, 6819327, 20457981]

約数ペア:

[(1, 20457981), (3, 6819327), (9, 2273109), (27, 757703), (43, 475767), (67, 305343), (129, 158589), (201, 101781), (263, 77787), (387, 52863), (603, 33927), (789, 25929), (1161, 17621), (1809, 11309), (2367, 8643), (2881, 7101)]