81609872

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{118619}}^1$

素因数の和:118670

約数の個数: 20

約数和(自身を含む): 161797680

約数和(自身を除く): 80187808

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 118619, 237238, 474476, 948952, 1897904, 5100617, 10201234, 20402468, 40804936, 81609872]

約数ペア:

[(1, 81609872), (2, 40804936), (4, 20402468), (8, 10201234), (16, 5100617), (43, 1897904), (86, 948952), (172, 474476), (344, 237238), (688, 118619)]