19777721

素因数分解:

${\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{401}}^1$

素因数の和:512

約数の個数: 16

約数和(自身を含む): 21508608

約数和(自身を除く): 1730887

約数列:

[1, 31, 37, 43, 401, 1147, 1333, 1591, 12431, 14837, 17243, 49321, 459947, 534533, 637991, 19777721]

約数ペア:

[(1, 19777721), (31, 637991), (37, 534533), (43, 459947), (401, 49321), (1147, 17243), (1333, 14837), (1591, 12431)]