19990216

素因数分解:

$2^3\times {\mathrm{1553}}^1\times {\mathrm{1609}}^1$

素因数の和:3168

約数の個数: 16

約数和(自身を含む): 37529100

約数和(自身を除く): 17538884

約数列:

[1, 2, 4, 8, 1553, 1609, 3106, 3218, 6212, 6436, 12424, 12872, 2498777, 4997554, 9995108, 19990216]

約数ペア:

[(1, 19990216), (2, 9995108), (4, 4997554), (8, 2498777), (1553, 12872), (1609, 12424), (3106, 6436), (3218, 6212)]