19651989

素因数分解:

$3^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{3109}}^1$

素因数の和:3169

約数の個数: 24

約数和(自身を含む): 31199520

約数和(自身を除く): 11547531

約数列:

[1, 3, 7, 21, 43, 49, 129, 147, 301, 903, 2107, 3109, 6321, 9327, 21763, 65289, 133687, 152341, 401061, 457023, 935809, 2807427, 6550663, 19651989]

約数ペア:

[(1, 19651989), (3, 6550663), (7, 2807427), (21, 935809), (43, 457023), (49, 401061), (129, 152341), (147, 133687), (301, 65289), (903, 21763), (2107, 9327), (3109, 6321)]