21521656

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{206939}}^1$

素因数の和:206958

約数の個数: 16

約数和(自身を含む): 43457400

約数和(自身を除く): 21935744

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 206939, 413878, 827756, 1655512, 2690207, 5380414, 10760828, 21521656]

約数ペア:

[(1, 21521656), (2, 10760828), (4, 5380414), (8, 2690207), (13, 1655512), (26, 827756), (52, 413878), (104, 206939)]