21280520

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{23131}}^1$

素因数の和:23165

約数の個数: 32

約数和(自身を含む): 49965120

約数和(自身を除く): 28684600

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 184, 230, 460, 920, 23131, 46262, 92524, 115655, 185048, 231310, 462620, 532013, 925240, 1064026, 2128052, 2660065, 4256104, 5320130, 10640260, 21280520]

約数ペア:

[(1, 21280520), (2, 10640260), (4, 5320130), (5, 4256104), (8, 2660065), (10, 2128052), (20, 1064026), (23, 925240), (40, 532013), (46, 462620), (92, 231310), (115, 185048), (184, 115655), (230, 92524), (460, 46262), (920, 23131)]