20403784

素因数分解:

$2^3\times {\mathrm{89}}^1\times {\mathrm{28657}}^1$

素因数の和:28752

約数の個数: 16

約数和(自身を含む): 38688300

約数和(自身を除く): 18284516

約数列:

[1, 2, 4, 8, 89, 178, 356, 712, 28657, 57314, 114628, 229256, 2550473, 5100946, 10201892, 20403784]

約数ペア:

[(1, 20403784), (2, 10201892), (4, 5100946), (8, 2550473), (89, 229256), (178, 114628), (356, 57314), (712, 28657)]