257601981

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{49663}}^1$

素因数の和:49705

約数の個数: 32

約数和(自身を含む): 444989440

約数和(自身を除く): 187387459

約数列:

[1, 3, 7, 13, 19, 21, 39, 57, 91, 133, 247, 273, 399, 741, 1729, 5187, 49663, 148989, 347641, 645619, 943597, 1042923, 1936857, 2830791, 4519333, 6605179, 12266761, 13557999, 19815537, 36800283, 85867327, 257601981]

約数ペア:

[(1, 257601981), (3, 85867327), (7, 36800283), (13, 19815537), (19, 13557999), (21, 12266761), (39, 6605179), (57, 4519333), (91, 2830791), (133, 1936857), (247, 1042923), (273, 943597), (399, 645619), (741, 347641), (1729, 148989), (5187, 49663)]