28278369

素因数分解:

$3^3\times 7^1\times {\mathrm{157}}^1\times {\mathrm{953}}^1$

素因数の和:1126

約数の個数: 32

約数和(自身を含む): 48234240

約数和(自身を除く): 19955871

約数列:

[1, 3, 7, 9, 21, 27, 63, 157, 189, 471, 953, 1099, 1413, 2859, 3297, 4239, 6671, 8577, 9891, 20013, 25731, 29673, 60039, 149621, 180117, 448863, 1047347, 1346589, 3142041, 4039767, 9426123, 28278369]

約数ペア:

[(1, 28278369), (3, 9426123), (7, 4039767), (9, 3142041), (21, 1346589), (27, 1047347), (63, 448863), (157, 180117), (189, 149621), (471, 60039), (953, 29673), (1099, 25731), (1413, 20013), (2859, 9891), (3297, 8577), (4239, 6671)]