19970881

素因数分解:

$7^2\times {\mathrm{19}}^2\times {\mathrm{1129}}^1$

素因数の和:1181

約数の個数: 18

約数和(自身を含む): 24540210

約数和(自身を除く): 4569329

約数列:

[1, 7, 19, 49, 133, 361, 931, 1129, 2527, 7903, 17689, 21451, 55321, 150157, 407569, 1051099, 2852983, 19970881]

約数ペア:

[(1, 19970881), (7, 2852983), (19, 1051099), (49, 407569), (133, 150157), (361, 55321), (931, 21451), (1129, 17689), (2527, 7903)]