20420872688

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{29681501}}^1$

素因数の和:29681552

約数の個数: 20

約数和(自身を含む): 40485568728

約数和(自身を除く): 20064696040

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 29681501, 59363002, 118726004, 237452008, 474904016, 1276304543, 2552609086, 5105218172, 10210436344, 20420872688]

約数ペア:

[(1, 20420872688), (2, 10210436344), (4, 5105218172), (8, 2552609086), (16, 1276304543), (43, 474904016), (86, 237452008), (172, 118726004), (344, 59363002), (688, 29681501)]