21563253

素因数分解:

$3^4\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{151}}^1$

素因数の和:247

約数の個数: 40

約数和(自身を含む): 33988416

約数和(自身を除く): 12425163

約数列:

[1, 3, 9, 27, 41, 43, 81, 123, 129, 151, 369, 387, 453, 1107, 1161, 1359, 1763, 3321, 3483, 4077, 5289, 6191, 6493, 12231, 15867, 18573, 19479, 47601, 55719, 58437, 142803, 167157, 175311, 266213, 501471, 525933, 798639, 2395917, 7187751, 21563253]

約数ペア:

[(1, 21563253), (3, 7187751), (9, 2395917), (27, 798639), (41, 525933), (43, 501471), (81, 266213), (123, 175311), (129, 167157), (151, 142803), (369, 58437), (387, 55719), (453, 47601), (1107, 19479), (1161, 18573), (1359, 15867), (1763, 12231), (3321, 6493), (3483, 6191), (4077, 5289)]