18976985

素因数分解:

$5^1\times {\mathrm{79}}^1\times {\mathrm{107}}^1\times {\mathrm{449}}^1$

素因数の和:640

約数の個数: 16

約数和(自身を含む): 23328000

約数和(自身を除く): 4351015

約数列:

[1, 5, 79, 107, 395, 449, 535, 2245, 8453, 35471, 42265, 48043, 177355, 240215, 3795397, 18976985]

約数ペア:

[(1, 18976985), (5, 3795397), (79, 240215), (107, 177355), (395, 48043), (449, 42265), (535, 35471), (2245, 8453)]