18997279

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{263}}^1\times {\mathrm{607}}^1$

素因数の和:894

約数の個数: 16

約数和(自身を含む): 23113728

約数和(自身を除く): 4116449

約数列:

[1, 7, 17, 119, 263, 607, 1841, 4249, 4471, 10319, 31297, 72233, 159641, 1117487, 2713897, 18997279]

約数ペア:

[(1, 18997279), (7, 2713897), (17, 1117487), (119, 159641), (263, 72233), (607, 31297), (1841, 10319), (4249, 4471)]