211691221

素因数分解:

$7^2\times {\mathrm{191}}^1\times {\mathrm{22619}}^1$

素因数の和:22824

約数の個数: 12

約数和(自身を含む): 247553280

約数和(自身を除く): 35862059

約数列:

[1, 7, 49, 191, 1337, 9359, 22619, 158333, 1108331, 4320229, 30241603, 211691221]

約数ペア:

[(1, 211691221), (7, 30241603), (49, 4320229), (191, 1108331), (1337, 158333), (9359, 22619)]