21409297

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{193}}^1$

素因数の和:289

約数の個数: 32

約数和(自身を含む): 28159488

約数和(自身を除く): 6750191

約数列:

[1, 7, 13, 23, 53, 91, 161, 193, 299, 371, 689, 1219, 1351, 2093, 2509, 4439, 4823, 8533, 10229, 15847, 17563, 31073, 57707, 71603, 110929, 132977, 235267, 403949, 930839, 1646869, 3058471, 21409297]

約数ペア:

[(1, 21409297), (7, 3058471), (13, 1646869), (23, 930839), (53, 403949), (91, 235267), (161, 132977), (193, 110929), (299, 71603), (371, 57707), (689, 31073), (1219, 17563), (1351, 15847), (2093, 10229), (2509, 8533), (4439, 4823)]