221569478

素因数分解:

$2^1\times {\mathrm{13}}^2\times {\mathrm{655531}}^1$

素因数の和:655559

約数の個数: 12

約数和(自身を含む): 359887068

約数和(自身を除く): 138317590

約数列:

[1, 2, 13, 26, 169, 338, 655531, 1311062, 8521903, 17043806, 110784739, 221569478]

約数ペア:

[(1, 221569478), (2, 110784739), (13, 17043806), (26, 8521903), (169, 1311062), (338, 655531)]