16860820

素因数分解:

$2^2\times 5^1\times {\mathrm{647}}^1\times {\mathrm{1303}}^1$

素因数の和:1959

約数の個数: 24

約数和(自身を含む): 35489664

約数和(自身を除く): 18628844

約数列:

[1, 2, 4, 5, 10, 20, 647, 1294, 1303, 2588, 2606, 3235, 5212, 6470, 6515, 12940, 13030, 26060, 843041, 1686082, 3372164, 4215205, 8430410, 16860820]

約数ペア:

[(1, 16860820), (2, 8430410), (4, 4215205), (5, 3372164), (10, 1686082), (20, 843041), (647, 26060), (1294, 13030), (1303, 12940), (2588, 6515), (2606, 6470), (3235, 5212)]