19778899

素因数分解:

$7^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{449}}^1$

素因数の和:523

約数の個数: 24

約数和(自身を含む): 24624000

約数和(自身を除く): 4845101

約数列:

[1, 7, 29, 31, 49, 203, 217, 449, 899, 1421, 1519, 3143, 6293, 13021, 13919, 22001, 44051, 91147, 97433, 403651, 638029, 682031, 2825557, 19778899]

約数ペア:

[(1, 19778899), (7, 2825557), (29, 682031), (31, 638029), (49, 403651), (203, 97433), (217, 91147), (449, 44051), (899, 22001), (1421, 13919), (1519, 13021), (3143, 6293)]