20139042920

素因数分解:

$2^3\times 5^1\times {\mathrm{643}}^1\times {\mathrm{783011}}^1$

素因数の和:783665

約数の個数: 32

約数和(自身を含む): 45383375520

約数和(自身を除く): 25244332600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 643, 1286, 2572, 3215, 5144, 6430, 12860, 25720, 783011, 1566022, 3132044, 3915055, 6264088, 7830110, 15660220, 31320440, 503476073, 1006952146, 2013904292, 2517380365, 4027808584, 5034760730, 10069521460, 20139042920]

約数ペア:

[(1, 20139042920), (2, 10069521460), (4, 5034760730), (5, 4027808584), (8, 2517380365), (10, 2013904292), (20, 1006952146), (40, 503476073), (643, 31320440), (1286, 15660220), (2572, 7830110), (3215, 6264088), (5144, 3915055), (6430, 3132044), (12860, 1566022), (25720, 783011)]