21684104

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{208501}}^1$

素因数の和:208520

約数の個数: 16

約数和(自身を含む): 43785420

約数和(自身を除く): 22101316

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 208501, 417002, 834004, 1668008, 2710513, 5421026, 10842052, 21684104]

約数ペア:

[(1, 21684104), (2, 10842052), (4, 5421026), (8, 2710513), (13, 1668008), (26, 834004), (52, 417002), (104, 208501)]