81381748

素因数分解:

$2^2\times 7^2\times {\mathrm{415213}}^1$

素因数の和:415231

約数の個数: 18

約数和(自身を含む): 165670386

約数和(自身を除く): 84288638

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 415213, 830426, 1660852, 2906491, 5812982, 11625964, 20345437, 40690874, 81381748]

約数ペア:

[(1, 81381748), (2, 40690874), (4, 20345437), (7, 11625964), (14, 5812982), (28, 2906491), (49, 1660852), (98, 830426), (196, 415213)]