21170480

素因数分解:

$2^4\times 5^1\times {\mathrm{264631}}^1$

素因数の和:264644

約数の個数: 20

約数和(自身を含む): 49221552

約数和(自身を除く): 28051072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 264631, 529262, 1058524, 1323155, 2117048, 2646310, 4234096, 5292620, 10585240, 21170480]

約数ペア:

[(1, 21170480), (2, 10585240), (4, 5292620), (5, 4234096), (8, 2646310), (10, 2117048), (16, 1323155), (20, 1058524), (40, 529262), (80, 264631)]