21012309

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{1193}}^1$

素因数の和:1321

約数の個数: 24

約数和(自身を含む): 32285760

約数和(自身を除く): 11273451

約数列:

[1, 3, 9, 19, 57, 103, 171, 309, 927, 1193, 1957, 3579, 5871, 10737, 17613, 22667, 68001, 122879, 204003, 368637, 1105911, 2334701, 7004103, 21012309]

約数ペア:

[(1, 21012309), (3, 7004103), (9, 2334701), (19, 1105911), (57, 368637), (103, 204003), (171, 122879), (309, 68001), (927, 22667), (1193, 17613), (1957, 10737), (3579, 5871)]