19721611

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{6991}}^1$

素因数の和:7042

約数の個数: 16

約数和(自身を含む): 25059328

約数和(自身を除く): 5337717

約数列:

[1, 7, 13, 31, 91, 217, 403, 2821, 6991, 48937, 90883, 216721, 636181, 1517047, 2817373, 19721611]

約数ペア:

[(1, 19721611), (7, 2817373), (13, 1517047), (31, 636181), (91, 216721), (217, 90883), (403, 48937), (2821, 6991)]