21328904

素因数分解:

$2^3\times {\mathrm{1609}}^1\times {\mathrm{1657}}^1$

素因数の和:3272

約数の個数: 16

約数和(自身を含む): 40040700

約数和(自身を除く): 18711796

約数列:

[1, 2, 4, 8, 1609, 1657, 3218, 3314, 6436, 6628, 12872, 13256, 2666113, 5332226, 10664452, 21328904]

約数ペア:

[(1, 21328904), (2, 10664452), (4, 5332226), (8, 2666113), (1609, 13256), (1657, 12872), (3218, 6628), (3314, 6436)]