399654243

素因数分解:

$3^4\times {\mathrm{71}}^1\times {\mathrm{69493}}^1$

素因数の和:69576

約数の個数: 20

約数和(自身を含む): 605431728

約数和(自身を除く): 205777485

約数列:

[1, 3, 9, 27, 71, 81, 213, 639, 1917, 5751, 69493, 208479, 625437, 1876311, 4934003, 5628933, 14802009, 44406027, 133218081, 399654243]

約数ペア:

[(1, 399654243), (3, 133218081), (9, 44406027), (27, 14802009), (71, 5628933), (81, 4934003), (213, 1876311), (639, 625437), (1917, 208479), (5751, 69493)]