19499991

素因数分解:

$3^1\times 7^2\times {\mathrm{109}}^1\times {\mathrm{1217}}^1$

素因数の和:1343

約数の個数: 24

約数和(自身を含む): 30547440

約数和(自身を除く): 11047449

約数列:

[1, 3, 7, 21, 49, 109, 147, 327, 763, 1217, 2289, 3651, 5341, 8519, 16023, 25557, 59633, 132653, 178899, 397959, 928571, 2785713, 6499997, 19499991]

約数ペア:

[(1, 19499991), (3, 6499997), (7, 2785713), (21, 928571), (49, 397959), (109, 178899), (147, 132653), (327, 59633), (763, 25557), (1217, 16023), (2289, 8519), (3651, 5341)]