81605320

素因数分解:

$2^3\times 5^1\times {\mathrm{2040133}}^1$

素因数の和:2040144

約数の個数: 16

約数和(自身を含む): 183612060

約数和(自身を除く): 102006740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2040133, 4080266, 8160532, 10200665, 16321064, 20401330, 40802660, 81605320]

約数ペア:

[(1, 81605320), (2, 40802660), (4, 20401330), (5, 16321064), (8, 10200665), (10, 8160532), (20, 4080266), (40, 2040133)]