278399920

素因数分解:

$2^4\times 5^1\times {\mathrm{3479999}}^1$

素因数の和:3480012

約数の個数: 20

約数和(自身を含む): 647280000

約数和(自身を除く): 368880080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 3479999, 6959998, 13919996, 17399995, 27839992, 34799990, 55679984, 69599980, 139199960, 278399920]

約数ペア:

[(1, 278399920), (2, 139199960), (4, 69599980), (5, 55679984), (8, 34799990), (10, 27839992), (16, 17399995), (20, 13919996), (40, 6959998), (80, 3479999)]