21539427

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{307}}^1$

素因数の和:587

約数の個数: 32

約数和(自身を含む): 35599872

約数和(自身を除く): 14060445

約数列:

[1, 3, 7, 13, 21, 39, 91, 257, 273, 307, 771, 921, 1799, 2149, 3341, 3991, 5397, 6447, 10023, 11973, 23387, 27937, 70161, 78899, 83811, 236697, 552293, 1025687, 1656879, 3077061, 7179809, 21539427]

約数ペア:

[(1, 21539427), (3, 7179809), (7, 3077061), (13, 1656879), (21, 1025687), (39, 552293), (91, 236697), (257, 83811), (273, 78899), (307, 70161), (771, 27937), (921, 23387), (1799, 11973), (2149, 10023), (3341, 6447), (3991, 5397)]