15721840

素因数分解:

$2^4\times 5^1\times {\mathrm{196523}}^1$

素因数の和:196536

約数の個数: 20

約数和(自身を含む): 36553464

約数和(自身を除く): 20831624

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 196523, 393046, 786092, 982615, 1572184, 1965230, 3144368, 3930460, 7860920, 15721840]

約数ペア:

[(1, 15721840), (2, 7860920), (4, 3930460), (5, 3144368), (8, 1965230), (10, 1572184), (16, 982615), (20, 786092), (40, 393046), (80, 196523)]