20988933

素因数分解:

$3^1\times 7^1\times {\mathrm{257}}^1\times {\mathrm{3889}}^1$

素因数の和:4156

約数の個数: 16

約数和(自身を含む): 32115840

約数和(自身を除く): 11126907

約数列:

[1, 3, 7, 21, 257, 771, 1799, 3889, 5397, 11667, 27223, 81669, 999473, 2998419, 6996311, 20988933]

約数ペア:

[(1, 20988933), (3, 6996311), (7, 2998419), (21, 999473), (257, 81669), (771, 27223), (1799, 11667), (3889, 5397)]