13991999

素因数分解:

$7^3\times {\mathrm{19}}^2\times {\mathrm{113}}^1$

素因数の和:172

約数の個数: 24

約数和(自身を含む): 17373600

約数和(自身を除く): 3381601

約数列:

[1, 7, 19, 49, 113, 133, 343, 361, 791, 931, 2147, 2527, 5537, 6517, 15029, 17689, 38759, 40793, 105203, 123823, 285551, 736421, 1998857, 13991999]

約数ペア:

[(1, 13991999), (7, 1998857), (19, 736421), (49, 285551), (113, 123823), (133, 105203), (343, 40793), (361, 38759), (791, 17689), (931, 15029), (2147, 6517), (2527, 5537)]