19999160

素因数分解:

$2^3\times 5^1\times {\mathrm{499979}}^1$

素因数の和:499990

約数の個数: 16

約数和(自身を含む): 44998200

約数和(自身を除く): 24999040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499979, 999958, 1999916, 2499895, 3999832, 4999790, 9999580, 19999160]

約数ペア:

[(1, 19999160), (2, 9999580), (4, 4999790), (5, 3999832), (8, 2499895), (10, 1999916), (20, 999958), (40, 499979)]