19864747

素因数分解:

$7^2\times {\mathrm{19}}^2\times {\mathrm{1123}}^1$

素因数の和:1175

約数の個数: 18

約数和(自身を含む): 24409908

約数和(自身を除く): 4545161

約数列:

[1, 7, 19, 49, 133, 361, 931, 1123, 2527, 7861, 17689, 21337, 55027, 149359, 405403, 1045513, 2837821, 19864747]

約数ペア:

[(1, 19864747), (7, 2837821), (19, 1045513), (49, 405403), (133, 149359), (361, 55027), (931, 21337), (1123, 17689), (2527, 7861)]