19685421

素因数分解:

$3^2\times 7^1\times {\mathrm{193}}^1\times {\mathrm{1619}}^1$

素因数の和:1825

約数の個数: 24

約数和(自身を含む): 32685120

約数和(自身を除く): 12999699

約数列:

[1, 3, 7, 9, 21, 63, 193, 579, 1351, 1619, 1737, 4053, 4857, 11333, 12159, 14571, 33999, 101997, 312467, 937401, 2187269, 2812203, 6561807, 19685421]

約数ペア:

[(1, 19685421), (3, 6561807), (7, 2812203), (9, 2187269), (21, 937401), (63, 312467), (193, 101997), (579, 33999), (1351, 14571), (1619, 12159), (1737, 11333), (4053, 4857)]