678640660

素因数分解:

$2^2\times 5^1\times {\mathrm{2473}}^1\times {\mathrm{13721}}^1$

素因数の和:16203

約数の個数: 24

約数和(自身を含む): 1425825576

約数和(自身を除く): 747184916

約数列:

[1, 2, 4, 5, 10, 20, 2473, 4946, 9892, 12365, 13721, 24730, 27442, 49460, 54884, 68605, 137210, 274420, 33932033, 67864066, 135728132, 169660165, 339320330, 678640660]

約数ペア:

[(1, 678640660), (2, 339320330), (4, 169660165), (5, 135728132), (10, 67864066), (20, 33932033), (2473, 274420), (4946, 137210), (9892, 68605), (12365, 54884), (13721, 49460), (24730, 27442)]