28263820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{108707}}^1$

素因数の和:108729

約数の個数: 24

約数和(自身を含む): 63920304

約数和(自身を除く): 35656484

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 108707, 217414, 434828, 543535, 1087070, 1413191, 2174140, 2826382, 5652764, 7065955, 14131910, 28263820]

約数ペア:

[(1, 28263820), (2, 14131910), (4, 7065955), (5, 5652764), (10, 2826382), (13, 2174140), (20, 1413191), (26, 1087070), (52, 543535), (65, 434828), (130, 217414), (260, 108707)]