20805884

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{509}}^1\times {\mathrm{929}}^1$

素因数の和:1453

約数の個数: 24

約数和(自身を含む): 39841200

約数和(自身を除く): 19035316

約数列:

[1, 2, 4, 11, 22, 44, 509, 929, 1018, 1858, 2036, 3716, 5599, 10219, 11198, 20438, 22396, 40876, 472861, 945722, 1891444, 5201471, 10402942, 20805884]

約数ペア:

[(1, 20805884), (2, 10402942), (4, 5201471), (11, 1891444), (22, 945722), (44, 472861), (509, 40876), (929, 22396), (1018, 20438), (1858, 11198), (2036, 10219), (3716, 5599)]