19782971

素因数分解:

${\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1$

素因数の和:207

約数の個数: 24

約数和(自身を含む): 23145840

約数和(自身を除く): 3362869

約数列:

[1, 13, 19, 61, 101, 169, 247, 793, 1159, 1313, 1919, 3211, 6161, 10309, 15067, 17069, 24947, 80093, 117059, 195871, 324311, 1041209, 1521767, 19782971]

約数ペア:

[(1, 19782971), (13, 1521767), (19, 1041209), (61, 324311), (101, 195871), (169, 117059), (247, 80093), (793, 24947), (1159, 17069), (1313, 15067), (1919, 10309), (3211, 6161)]