19701773

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{197}}^1$

素因数の和:381

約数の個数: 24

約数和(自身を含む): 24964632

約数和(自身を除く): 5262859

約数列:

[1, 7, 13, 49, 91, 157, 197, 637, 1099, 1379, 2041, 2561, 7693, 9653, 14287, 17927, 30929, 100009, 125489, 216503, 402077, 1515521, 2814539, 19701773]

約数ペア:

[(1, 19701773), (7, 2814539), (13, 1515521), (49, 402077), (91, 216503), (157, 125489), (197, 100009), (637, 30929), (1099, 17927), (1379, 14287), (2041, 9653), (2561, 7693)]