21248297

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{271}}^1\times {\mathrm{487}}^1$

素因数の和:788

約数の個数: 16

約数和(自身を含む): 25485312

約数和(自身を除く): 4237015

約数列:

[1, 7, 23, 161, 271, 487, 1897, 3409, 6233, 11201, 43631, 78407, 131977, 923839, 3035471, 21248297]

約数ペア:

[(1, 21248297), (7, 3035471), (23, 923839), (161, 131977), (271, 78407), (487, 43631), (1897, 11201), (3409, 6233)]