20856987

素因数分解:

$3^3\times {\mathrm{41}}^1\times {\mathrm{83}}^1\times {\mathrm{227}}^1$

素因数の和:360

約数の個数: 32

約数和(自身を含む): 32175360

約数和(自身を除く): 11318373

約数列:

[1, 3, 9, 27, 41, 83, 123, 227, 249, 369, 681, 747, 1107, 2043, 2241, 3403, 6129, 9307, 10209, 18841, 27921, 30627, 56523, 83763, 91881, 169569, 251289, 508707, 772481, 2317443, 6952329, 20856987]

約数ペア:

[(1, 20856987), (3, 6952329), (9, 2317443), (27, 772481), (41, 508707), (83, 251289), (123, 169569), (227, 91881), (249, 83763), (369, 56523), (681, 30627), (747, 27921), (1107, 18841), (2043, 10209), (2241, 9307), (3403, 6129)]