21805120

素因数分解:

$2^6\times 5^1\times {\mathrm{68141}}^1$

素因数の和:68158

約数の個数: 28

約数和(自身を含む): 51924204

約数和(自身を除く): 30119084

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 68141, 136282, 272564, 340705, 545128, 681410, 1090256, 1362820, 2180512, 2725640, 4361024, 5451280, 10902560, 21805120]

約数ペア:

[(1, 21805120), (2, 10902560), (4, 5451280), (5, 4361024), (8, 2725640), (10, 2180512), (16, 1362820), (20, 1090256), (32, 681410), (40, 545128), (64, 340705), (80, 272564), (160, 136282), (320, 68141)]