21989836

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{7039}}^1$

素因数の和:7125

約数の個数: 24

約数和(自身を含む): 42577920

約数和(自身を除く): 20588084

約数列:

[1, 2, 4, 11, 22, 44, 71, 142, 284, 781, 1562, 3124, 7039, 14078, 28156, 77429, 154858, 309716, 499769, 999538, 1999076, 5497459, 10994918, 21989836]

約数ペア:

[(1, 21989836), (2, 10994918), (4, 5497459), (11, 1999076), (22, 999538), (44, 499769), (71, 309716), (142, 154858), (284, 77429), (781, 28156), (1562, 14078), (3124, 7039)]