28807857

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{12959}}^1$

素因数の和:12997

約数の個数: 24

約数和(自身を含む): 47174400

約数和(自身を除く): 18366543

約数列:

[1, 3, 9, 13, 19, 39, 57, 117, 171, 247, 741, 2223, 12959, 38877, 116631, 168467, 246221, 505401, 738663, 1516203, 2215989, 3200873, 9602619, 28807857]

約数ペア:

[(1, 28807857), (3, 9602619), (9, 3200873), (13, 2215989), (19, 1516203), (39, 738663), (57, 505401), (117, 246221), (171, 168467), (247, 116631), (741, 38877), (2223, 12959)]