6399920

素因数分解:

$2^4\times 5^1\times {\mathrm{79999}}^1$

素因数の和:80012

約数の個数: 20

約数和(自身を含む): 14880000

約数和(自身を除く): 8480080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 79999, 159998, 319996, 399995, 639992, 799990, 1279984, 1599980, 3199960, 6399920]

約数ペア:

[(1, 6399920), (2, 3199960), (4, 1599980), (5, 1279984), (8, 799990), (10, 639992), (16, 399995), (20, 319996), (40, 159998), (80, 79999)]