20328581

素因数分解:

$7^3\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{97}}^1$

素因数の和:178

約数の個数: 32

約数和(自身を含む): 26342400

約数和(自身を除く): 6013819

約数列:

[1, 7, 13, 47, 49, 91, 97, 329, 343, 611, 637, 679, 1261, 2303, 4277, 4459, 4559, 4753, 8827, 16121, 29939, 31913, 33271, 59267, 61789, 209573, 223391, 414869, 432523, 1563737, 2904083, 20328581]

約数ペア:

[(1, 20328581), (7, 2904083), (13, 1563737), (47, 432523), (49, 414869), (91, 223391), (97, 209573), (329, 61789), (343, 59267), (611, 33271), (637, 31913), (679, 29939), (1261, 16121), (2303, 8827), (4277, 4753), (4459, 4559)]