21981969

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{577}}^1$

素因数の和:686

約数の個数: 32

約数和(自身を含む): 34957440

約数和(自身を除く): 12975471

約数列:

[1, 3, 9, 17, 27, 51, 83, 153, 249, 459, 577, 747, 1411, 1731, 2241, 4233, 5193, 9809, 12699, 15579, 29427, 38097, 47891, 88281, 143673, 264843, 431019, 814147, 1293057, 2442441, 7327323, 21981969]

約数ペア:

[(1, 21981969), (3, 7327323), (9, 2442441), (17, 1293057), (27, 814147), (51, 431019), (83, 264843), (153, 143673), (249, 88281), (459, 47891), (577, 38097), (747, 29427), (1411, 15579), (1731, 12699), (2241, 9809), (4233, 5193)]