19667781

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4397}}^1$

素因数の和:4481

約数の個数: 24

約数和(自身を含む): 32932224

約数和(自身を除く): 13264443

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4397, 4473, 13191, 30779, 39573, 92337, 277011, 312187, 936561, 2185309, 2809683, 6555927, 19667781]

約数ペア:

[(1, 19667781), (3, 6555927), (7, 2809683), (9, 2185309), (21, 936561), (63, 312187), (71, 277011), (213, 92337), (497, 39573), (639, 30779), (1491, 13191), (4397, 4473)]