18997281

素因数分解:

$3^3\times {\mathrm{491}}^1\times {\mathrm{1433}}^1$

素因数の和:1933

約数の個数: 16

約数和(自身を含む): 28221120

約数和(自身を除く): 9223839

約数列:

[1, 3, 9, 27, 491, 1433, 1473, 4299, 4419, 12897, 13257, 38691, 703603, 2110809, 6332427, 18997281]

約数ペア:

[(1, 18997281), (3, 6332427), (9, 2110809), (27, 703603), (491, 38691), (1433, 13257), (1473, 12897), (4299, 4419)]