20561140

素因数分解:

$2^2\times 5^1\times {\mathrm{487}}^1\times {\mathrm{2111}}^1$

素因数の和:2607

約数の個数: 24

約数和(自身を含む): 43287552

約数和(自身を除く): 22726412

約数列:

[1, 2, 4, 5, 10, 20, 487, 974, 1948, 2111, 2435, 4222, 4870, 8444, 9740, 10555, 21110, 42220, 1028057, 2056114, 4112228, 5140285, 10280570, 20561140]

約数ペア:

[(1, 20561140), (2, 10280570), (4, 5140285), (5, 4112228), (10, 2056114), (20, 1028057), (487, 42220), (974, 21110), (1948, 10555), (2111, 9740), (2435, 8444), (4222, 4870)]