20493319

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{193}}^1\times {\mathrm{197}}^1$

素因数の和:415

約数の個数: 24

約数和(自身を含む): 26273808

約数和(自身を除く): 5780489

約数列:

[1, 7, 11, 49, 77, 193, 197, 539, 1351, 1379, 2123, 2167, 9457, 9653, 14861, 15169, 38021, 104027, 106183, 266147, 418231, 1863029, 2927617, 20493319]

約数ペア:

[(1, 20493319), (7, 2927617), (11, 1863029), (49, 418231), (77, 266147), (193, 106183), (197, 104027), (539, 38021), (1351, 15169), (1379, 14861), (2123, 9653), (2167, 9457)]