18212887

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{211}}^1$

素因数の和:307

約数の個数: 32

約数和(自身を含む): 24422400

約数和(自身を除く): 6209513

約数列:

[1, 7, 11, 19, 59, 77, 133, 209, 211, 413, 649, 1121, 1463, 1477, 2321, 4009, 4543, 7847, 12331, 12449, 16247, 28063, 44099, 86317, 87143, 136939, 236531, 308693, 958573, 1655717, 2601841, 18212887]

約数ペア:

[(1, 18212887), (7, 2601841), (11, 1655717), (19, 958573), (59, 308693), (77, 236531), (133, 136939), (209, 87143), (211, 86317), (413, 44099), (649, 28063), (1121, 16247), (1463, 12449), (1477, 12331), (2321, 7847), (4009, 4543)]