21259790

素因数分解:

$2^1\times 5^1\times {\mathrm{73}}^1\times {\mathrm{29123}}^1$

素因数の和:29203

約数の個数: 16

約数和(自身を含む): 38793168

約数和(自身を除く): 17533378

約数列:

[1, 2, 5, 10, 73, 146, 365, 730, 29123, 58246, 145615, 291230, 2125979, 4251958, 10629895, 21259790]

約数ペア:

[(1, 21259790), (2, 10629895), (5, 4251958), (10, 2125979), (73, 291230), (146, 145615), (365, 58246), (730, 29123)]