21351309

素因数分解:

$3^1\times 7^2\times {\mathrm{337}}^1\times {\mathrm{431}}^1$

素因数の和:785

約数の個数: 24

約数和(自身を含む): 33291648

約数和(自身を除く): 11940339

約数列:

[1, 3, 7, 21, 49, 147, 337, 431, 1011, 1293, 2359, 3017, 7077, 9051, 16513, 21119, 49539, 63357, 145247, 435741, 1016729, 3050187, 7117103, 21351309]

約数ペア:

[(1, 21351309), (3, 7117103), (7, 3050187), (21, 1016729), (49, 435741), (147, 145247), (337, 63357), (431, 49539), (1011, 21119), (1293, 16513), (2359, 9051), (3017, 7077)]