19878807

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{193}}^1$

素因数の和:367

約数の個数: 32

約数和(自身を含む): 30419200

約数和(自身を除く): 10540393

約数列:

[1, 3, 13, 19, 39, 57, 139, 193, 247, 417, 579, 741, 1807, 2509, 2641, 3667, 5421, 7527, 7923, 11001, 26827, 34333, 47671, 80481, 102999, 143013, 348751, 509713, 1046253, 1529139, 6626269, 19878807]

約数ペア:

[(1, 19878807), (3, 6626269), (13, 1529139), (19, 1046253), (39, 509713), (57, 348751), (139, 143013), (193, 102999), (247, 80481), (417, 47671), (579, 34333), (741, 26827), (1807, 11001), (2509, 7923), (2641, 7527), (3667, 5421)]