81338140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{312839}}^1$

素因数の和:312861

約数の個数: 24

約数和(自身を含む): 183949920

約数和(自身を除く): 102611780

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 312839, 625678, 1251356, 1564195, 3128390, 4066907, 6256780, 8133814, 16267628, 20334535, 40669070, 81338140]

約数ペア:

[(1, 81338140), (2, 40669070), (4, 20334535), (5, 16267628), (10, 8133814), (13, 6256780), (20, 4066907), (26, 3128390), (52, 1564195), (65, 1251356), (130, 625678), (260, 312839)]