21009327

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1$

素因数の和:239

約数の個数: 32

約数和(自身を含む): 30632448

約数和(自身を除く): 9623121

約数列:

[1, 3, 23, 43, 69, 73, 97, 129, 219, 291, 989, 1679, 2231, 2967, 3139, 4171, 5037, 6693, 7081, 9417, 12513, 21243, 72197, 95933, 162863, 216591, 287799, 304483, 488589, 913449, 7003109, 21009327]

約数ペア:

[(1, 21009327), (3, 7003109), (23, 913449), (43, 488589), (69, 304483), (73, 287799), (97, 216591), (129, 162863), (219, 95933), (291, 72197), (989, 21243), (1679, 12513), (2231, 9417), (2967, 7081), (3139, 6693), (4171, 5037)]