21686292081

素因数分解:

$3^4\times {\mathrm{521}}^1\times {\mathrm{513881}}^1$

素因数の和:514414

約数の個数: 20

約数和(自身を含む): 32457814884

約数和(自身を除く): 10771522803

約数列:

[1, 3, 9, 27, 81, 521, 1563, 4689, 14067, 42201, 513881, 1541643, 4624929, 13874787, 41624361, 267732001, 803196003, 2409588009, 7228764027, 21686292081]

約数ペア:

[(1, 21686292081), (3, 7228764027), (9, 2409588009), (27, 803196003), (81, 267732001), (521, 41624361), (1563, 13874787), (4689, 4624929), (14067, 1541643), (42201, 513881)]