19905351

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{607}}^1\times {\mathrm{643}}^1$

素因数の和:1270

約数の個数: 16

約数和(自身を含む): 28191744

約数和(自身を除く): 8286393

約数列:

[1, 3, 17, 51, 607, 643, 1821, 1929, 10319, 10931, 30957, 32793, 390301, 1170903, 6635117, 19905351]

約数ペア:

[(1, 19905351), (3, 6635117), (17, 1170903), (51, 390301), (607, 32793), (643, 30957), (1821, 10931), (1929, 10319)]