1998999

素因数分解:

$3^4\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1$

素因数の和:101

約数の個数: 40

約数和(自身を含む): 3310560

約数和(自身を除く): 1311561

約数列:

[1, 3, 9, 23, 27, 29, 37, 69, 81, 87, 111, 207, 261, 333, 621, 667, 783, 851, 999, 1073, 1863, 2001, 2349, 2553, 2997, 3219, 6003, 7659, 9657, 18009, 22977, 24679, 28971, 54027, 68931, 74037, 86913, 222111, 666333, 1998999]

約数ペア:

[(1, 1998999), (3, 666333), (9, 222111), (23, 86913), (27, 74037), (29, 68931), (37, 54027), (69, 28971), (81, 24679), (87, 22977), (111, 18009), (207, 9657), (261, 7659), (333, 6003), (621, 3219), (667, 2997), (783, 2553), (851, 2349), (999, 2001), (1073, 1863)]