161721508

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{239233}}^1$

素因数の和:239263

約数の個数: 18

約数和(自身を含む): 306458754

約数和(自身を除く): 144737246

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 239233, 478466, 956932, 3110029, 6220058, 12440116, 40430377, 80860754, 161721508]

約数ペア:

[(1, 161721508), (2, 80860754), (4, 40430377), (13, 12440116), (26, 6220058), (52, 3110029), (169, 956932), (338, 478466), (676, 239233)]