278317228

素因数分解:

$2^2\times 7^1\times {\mathrm{9939901}}^1$

素因数の和:9939912

約数の個数: 12

約数和(自身を含む): 556634512

約数和(自身を除く): 278317284

約数列:

[1, 2, 4, 7, 14, 28, 9939901, 19879802, 39759604, 69579307, 139158614, 278317228]

約数ペア:

[(1, 278317228), (2, 139158614), (4, 69579307), (7, 39759604), (14, 19879802), (28, 9939901)]