20998857

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{313}}^1$

素因数の和:453

約数の個数: 32

約数和(自身を含む): 32555520

約数和(自身を除く): 11556663

約数列:

[1, 3, 11, 19, 33, 57, 107, 209, 313, 321, 627, 939, 1177, 2033, 3443, 3531, 5947, 6099, 10329, 17841, 22363, 33491, 65417, 67089, 100473, 196251, 368401, 636329, 1105203, 1908987, 6999619, 20998857]

約数ペア:

[(1, 20998857), (3, 6999619), (11, 1908987), (19, 1105203), (33, 636329), (57, 368401), (107, 196251), (209, 100473), (313, 67089), (321, 65417), (627, 33491), (939, 22363), (1177, 17841), (2033, 10329), (3443, 6099), (3531, 5947)]