221440540

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{257489}}^1$

素因数の和:257541

約数の個数: 24

約数和(自身を含む): 475841520

約数和(自身を除く): 254400980

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 257489, 514978, 1029956, 1287445, 2574890, 5149780, 11072027, 22144054, 44288108, 55360135, 110720270, 221440540]

約数ペア:

[(1, 221440540), (2, 110720270), (4, 55360135), (5, 44288108), (10, 22144054), (20, 11072027), (43, 5149780), (86, 2574890), (172, 1287445), (215, 1029956), (430, 514978), (860, 257489)]