18538891

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{3623}}^1$

素因数の和:3690

約数の個数: 16

約数和(自身を含む): 22961664

約数和(自身を除く): 4422773

約数列:

[1, 7, 17, 43, 119, 301, 731, 3623, 5117, 25361, 61591, 155789, 431137, 1090523, 2648413, 18538891]

約数ペア:

[(1, 18538891), (7, 2648413), (17, 1090523), (43, 431137), (119, 155789), (301, 61591), (731, 25361), (3623, 5117)]