678339981

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{61729}}^1$

素因数の和:61786

約数の個数: 32

約数和(自身を含む): 1125955200

約数和(自身を除く): 447615219

約数列:

[1, 3, 9, 11, 27, 33, 37, 99, 111, 297, 333, 407, 999, 1221, 3663, 10989, 61729, 185187, 555561, 679019, 1666683, 2037057, 2283973, 6111171, 6851919, 18333513, 20555757, 25123703, 61667271, 75371109, 226113327, 678339981]

約数ペア:

[(1, 678339981), (3, 226113327), (9, 75371109), (11, 61667271), (27, 25123703), (33, 20555757), (37, 18333513), (99, 6851919), (111, 6111171), (297, 2283973), (333, 2037057), (407, 1666683), (999, 679019), (1221, 555561), (3663, 185187), (10989, 61729)]