21160520

素因数分解:

$2^3\times 5^1\times {\mathrm{193}}^1\times {\mathrm{2741}}^1$

素因数の和:2945

約数の個数: 32

約数和(自身を含む): 47875320

約数和(自身を除く): 26714800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 193, 386, 772, 965, 1544, 1930, 2741, 3860, 5482, 7720, 10964, 13705, 21928, 27410, 54820, 109640, 529013, 1058026, 2116052, 2645065, 4232104, 5290130, 10580260, 21160520]

約数ペア:

[(1, 21160520), (2, 10580260), (4, 5290130), (5, 4232104), (8, 2645065), (10, 2116052), (20, 1058026), (40, 529013), (193, 109640), (386, 54820), (772, 27410), (965, 21928), (1544, 13705), (1930, 10964), (2741, 7720), (3860, 5482)]