80664520

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{28403}}^1$

素因数の和:28485

約数の個数: 32

約数和(自身を含む): 184057920

約数和(自身を除く): 103393400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 28403, 56806, 113612, 142015, 227224, 284030, 568060, 1136120, 2016613, 4033226, 8066452, 10083065, 16132904, 20166130, 40332260, 80664520]

約数ペア:

[(1, 80664520), (2, 40332260), (4, 20166130), (5, 16132904), (8, 10083065), (10, 8066452), (20, 4033226), (40, 2016613), (71, 1136120), (142, 568060), (284, 284030), (355, 227224), (568, 142015), (710, 113612), (1420, 56806), (2840, 28403)]