21282160

素因数分解:

$2^4\times 5^1\times {\mathrm{266027}}^1$

素因数の和:266040

約数の個数: 20

約数和(自身を含む): 49481208

約数和(自身を除く): 28199048

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 266027, 532054, 1064108, 1330135, 2128216, 2660270, 4256432, 5320540, 10641080, 21282160]

約数ペア:

[(1, 21282160), (2, 10641080), (4, 5320540), (5, 4256432), (8, 2660270), (10, 2128216), (16, 1330135), (20, 1064108), (40, 532054), (80, 266027)]