21371991

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{4243}}^1$

素因数の和:4342

約数の個数: 16

約数和(自身を含む): 30149376

約数和(自身を除く): 8777385

約数列:

[1, 3, 23, 69, 73, 219, 1679, 4243, 5037, 12729, 97589, 292767, 309739, 929217, 7123997, 21371991]

約数ペア:

[(1, 21371991), (3, 7123997), (23, 929217), (69, 309739), (73, 292767), (219, 97589), (1679, 12729), (4243, 5037)]