279580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{1997}}^1$

素因数の和:2013

約数の個数: 24

約数和(自身を含む): 671328

約数和(自身を除く): 391748

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 1997, 3994, 7988, 9985, 13979, 19970, 27958, 39940, 55916, 69895, 139790, 279580]

約数ペア:

[(1, 279580), (2, 139790), (4, 69895), (5, 55916), (7, 39940), (10, 27958), (14, 19970), (20, 13979), (28, 9985), (35, 7988), (70, 3994), (140, 1997)]