21249040

素因数分解:

$2^4\times 5^1\times {\mathrm{265613}}^1$

素因数の和:265626

約数の個数: 20

約数和(自身を含む): 49404204

約数和(自身を除く): 28155164

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 265613, 531226, 1062452, 1328065, 2124904, 2656130, 4249808, 5312260, 10624520, 21249040]

約数ペア:

[(1, 21249040), (2, 10624520), (4, 5312260), (5, 4249808), (8, 2656130), (10, 2124904), (16, 1328065), (20, 1062452), (40, 531226), (80, 265613)]