20991736

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{154351}}^1$

素因数の和:154374

約数の個数: 16

約数和(自身を含む): 41675040

約数和(自身を除く): 20683304

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 154351, 308702, 617404, 1234808, 2623967, 5247934, 10495868, 20991736]

約数ペア:

[(1, 20991736), (2, 10495868), (4, 5247934), (8, 2623967), (17, 1234808), (34, 617404), (68, 308702), (136, 154351)]