3997721

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{223}}^1$

素因数の和:440

約数の個数: 16

約数和(自身を含む): 4967424

約数和(自身を除く): 969703

約数列:

[1, 7, 13, 91, 197, 223, 1379, 1561, 2561, 2899, 17927, 20293, 43931, 307517, 571103, 3997721]

約数ペア:

[(1, 3997721), (7, 571103), (13, 307517), (91, 43931), (197, 20293), (223, 17927), (1379, 2899), (1561, 2561)]