261738140

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{66431}}^1$

素因数の和:66637

約数の個数: 24

約数和(自身を含む): 552448512

約数和(自身を除く): 290710372

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970, 3940, 66431, 132862, 265724, 332155, 664310, 1328620, 13086907, 26173814, 52347628, 65434535, 130869070, 261738140]

約数ペア:

[(1, 261738140), (2, 130869070), (4, 65434535), (5, 52347628), (10, 26173814), (20, 13086907), (197, 1328620), (394, 664310), (788, 332155), (985, 265724), (1970, 132862), (3940, 66431)]