81989680

素因数分解:

$2^4\times 5^1\times {\mathrm{1024871}}^1$

素因数の和:1024884

約数の個数: 20

約数和(自身を含む): 190626192

約数和(自身を除く): 108636512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1024871, 2049742, 4099484, 5124355, 8198968, 10248710, 16397936, 20497420, 40994840, 81989680]

約数ペア:

[(1, 81989680), (2, 40994840), (4, 20497420), (5, 16397936), (8, 10248710), (10, 8198968), (16, 5124355), (20, 4099484), (40, 2049742), (80, 1024871)]