21021957

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{1913}}^1$

素因数の和:1970

約数の個数: 32

約数和(自身を含む): 34911360

約数和(自身を除く): 13889403

約数列:

[1, 3, 9, 11, 27, 33, 37, 99, 111, 297, 333, 407, 999, 1221, 1913, 3663, 5739, 10989, 17217, 21043, 51651, 63129, 70781, 189387, 212343, 568161, 637029, 778591, 1911087, 2335773, 7007319, 21021957]

約数ペア:

[(1, 21021957), (3, 7007319), (9, 2335773), (11, 1911087), (27, 778591), (33, 637029), (37, 568161), (99, 212343), (111, 189387), (297, 70781), (333, 63129), (407, 51651), (999, 21043), (1221, 17217), (1913, 10989), (3663, 5739)]