21138052

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{406501}}^1$

素因数の和:406518

約数の個数: 12

約数和(自身を含む): 39837196

約数和(自身を除く): 18699144

約数列:

[1, 2, 4, 13, 26, 52, 406501, 813002, 1626004, 5284513, 10569026, 21138052]

約数ペア:

[(1, 21138052), (2, 10569026), (4, 5284513), (13, 1626004), (26, 813002), (52, 406501)]