19903209

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{12589}}^1$

素因数の和:12640

約数の個数: 16

約数和(自身を含む): 29007360

約数和(自身を除く): 9104151

約数列:

[1, 3, 17, 31, 51, 93, 527, 1581, 12589, 37767, 214013, 390259, 642039, 1170777, 6634403, 19903209]

約数ペア:

[(1, 19903209), (3, 6634403), (17, 1170777), (31, 642039), (51, 390259), (93, 214013), (527, 37767), (1581, 12589)]