217660540

素因数分解:

$2^2\times 5^1\times {\mathrm{1289}}^1\times {\mathrm{8443}}^1$

素因数の和:9741

約数の個数: 24

約数和(自身を含む): 457495920

約数和(自身を除く): 239835380

約数列:

[1, 2, 4, 5, 10, 20, 1289, 2578, 5156, 6445, 8443, 12890, 16886, 25780, 33772, 42215, 84430, 168860, 10883027, 21766054, 43532108, 54415135, 108830270, 217660540]

約数ペア:

[(1, 217660540), (2, 108830270), (4, 54415135), (5, 43532108), (10, 21766054), (20, 10883027), (1289, 168860), (2578, 84430), (5156, 42215), (6445, 33772), (8443, 25780), (12890, 16886)]