28391409

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{157}}^1\times {\mathrm{283}}^1$

素因数の和:517

約数の個数: 24

約数和(自身を含む): 42000192

約数和(自身を除く): 13608783

約数列:

[1, 3, 9, 71, 157, 213, 283, 471, 639, 849, 1413, 2547, 11147, 20093, 33441, 44431, 60279, 100323, 133293, 180837, 399879, 3154601, 9463803, 28391409]

約数ペア:

[(1, 28391409), (3, 9463803), (9, 3154601), (71, 399879), (157, 180837), (213, 133293), (283, 100323), (471, 60279), (639, 44431), (849, 33441), (1413, 20093), (2547, 11147)]