19997243

素因数分解:

$7^3\times {\mathrm{173}}^1\times {\mathrm{337}}^1$

素因数の和:531

約数の個数: 16

約数和(自身を含む): 23524800

約数和(自身を除く): 3527557

約数列:

[1, 7, 49, 173, 337, 343, 1211, 2359, 8477, 16513, 58301, 59339, 115591, 408107, 2856749, 19997243]

約数ペア:

[(1, 19997243), (7, 2856749), (49, 408107), (173, 115591), (337, 59339), (343, 58301), (1211, 16513), (2359, 8477)]