7801191

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{137}}^1$

素因数の和:205

約数の個数: 40

約数和(自身を含む): 12690480

約数和(自身を除く): 4889289

約数列:

[1, 3, 9, 19, 27, 37, 57, 81, 111, 137, 171, 333, 411, 513, 703, 999, 1233, 1539, 2109, 2603, 2997, 3699, 5069, 6327, 7809, 11097, 15207, 18981, 23427, 45621, 56943, 70281, 96311, 136863, 210843, 288933, 410589, 866799, 2600397, 7801191]

約数ペア:

[(1, 7801191), (3, 2600397), (9, 866799), (19, 410589), (27, 288933), (37, 210843), (57, 136863), (81, 96311), (111, 70281), (137, 56943), (171, 45621), (333, 23427), (411, 18981), (513, 15207), (703, 11097), (999, 7809), (1233, 6327), (1539, 5069), (2109, 3699), (2603, 2997)]