81643280

素因数分解:

$2^4\times 5^1\times {\mathrm{1020541}}^1$

素因数の和:1020554

約数の個数: 20

約数和(自身を含む): 189820812

約数和(自身を除く): 108177532

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1020541, 2041082, 4082164, 5102705, 8164328, 10205410, 16328656, 20410820, 40821640, 81643280]

約数ペア:

[(1, 81643280), (2, 40821640), (4, 20410820), (5, 16328656), (8, 10205410), (10, 8164328), (16, 5102705), (20, 4082164), (40, 2041082), (80, 1020541)]