21977907

素因数分解:

$3^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{9781}}^1$

素因数の和:9898

約数の個数: 16

約数和(自身を含む): 33806592

約数和(自身を除く): 11828685

約数列:

[1, 3, 7, 21, 107, 321, 749, 2247, 9781, 29343, 68467, 205401, 1046567, 3139701, 7325969, 21977907]

約数ペア:

[(1, 21977907), (3, 7325969), (7, 3139701), (21, 1046567), (107, 205401), (321, 68467), (749, 29343), (2247, 9781)]