17990991

素因数分解:

$3^6\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1$

素因数の和:107

約数の個数: 56

約数和(自身を含む): 29904480

約数和(自身を除く): 11913489

約数列:

[1, 3, 9, 23, 27, 29, 37, 69, 81, 87, 111, 207, 243, 261, 333, 621, 667, 729, 783, 851, 999, 1073, 1863, 2001, 2349, 2553, 2997, 3219, 5589, 6003, 7047, 7659, 8991, 9657, 16767, 18009, 21141, 22977, 24679, 26973, 28971, 54027, 68931, 74037, 86913, 162081, 206793, 222111, 260739, 486243, 620379, 666333, 782217, 1998999, 5996997, 17990991]

約数ペア:

[(1, 17990991), (3, 5996997), (9, 1998999), (23, 782217), (27, 666333), (29, 620379), (37, 486243), (69, 260739), (81, 222111), (87, 206793), (111, 162081), (207, 86913), (243, 74037), (261, 68931), (333, 54027), (621, 28971), (667, 26973), (729, 24679), (783, 22977), (851, 21141), (999, 18009), (1073, 16767), (1863, 9657), (2001, 8991), (2349, 7659), (2553, 7047), (2997, 6003), (3219, 5589)]