21057575

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{10939}}^1$

素因数の和:10967

約数の個数: 24

約数和(自身を含む): 32557440

約数和(自身を除く): 11499865

約数列:

[1, 5, 7, 11, 25, 35, 55, 77, 175, 275, 385, 1925, 10939, 54695, 76573, 120329, 273475, 382865, 601645, 842303, 1914325, 3008225, 4211515, 21057575]

約数ペア:

[(1, 21057575), (5, 4211515), (7, 3008225), (11, 1914325), (25, 842303), (35, 601645), (55, 382865), (77, 273475), (175, 120329), (275, 76573), (385, 54695), (1925, 10939)]