19986160

素因数分解:

$2^4\times 5^1\times {\mathrm{249827}}^1$

素因数の和:249840

約数の個数: 20

約数和(自身を含む): 46468008

約数和(自身を除く): 26481848

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 249827, 499654, 999308, 1249135, 1998616, 2498270, 3997232, 4996540, 9993080, 19986160]

約数ペア:

[(1, 19986160), (2, 9993080), (4, 4996540), (5, 3997232), (8, 2498270), (10, 1998616), (16, 1249135), (20, 999308), (40, 499654), (80, 249827)]