18340480

素因数分解:

$2^7\times 5^1\times {\mathrm{28657}}^1$

素因数の和:28676

約数の個数: 32

約数和(自身を含む): 43846740

約数和(自身を除く): 25506260

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 28657, 57314, 114628, 143285, 229256, 286570, 458512, 573140, 917024, 1146280, 1834048, 2292560, 3668096, 4585120, 9170240, 18340480]

約数ペア:

[(1, 18340480), (2, 9170240), (4, 4585120), (5, 3668096), (8, 2292560), (10, 1834048), (16, 1146280), (20, 917024), (32, 573140), (40, 458512), (64, 286570), (80, 229256), (128, 143285), (160, 114628), (320, 57314), (640, 28657)]