21779991

素因数分解:

$3^2\times {\mathrm{89}}^1\times {\mathrm{27191}}^1$

素因数の和:27286

約数の個数: 12

約数和(自身を含む): 31814640

約数和(自身を除く): 10034649

約数列:

[1, 3, 9, 89, 267, 801, 27191, 81573, 244719, 2419999, 7259997, 21779991]

約数ペア:

[(1, 21779991), (3, 7259997), (9, 2419999), (89, 244719), (267, 81573), (801, 27191)]