20664605

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{18701}}^1$

素因数の和:18736

約数の個数: 16

約数和(自身を含む): 28277424

約数和(自身を除く): 7612819

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 18701, 93505, 243113, 317917, 1215565, 1589585, 4132921, 20664605]

約数ペア:

[(1, 20664605), (5, 4132921), (13, 1589585), (17, 1215565), (65, 317917), (85, 243113), (221, 93505), (1105, 18701)]