20813485

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{7723}}^1$

素因数の和:7753

約数の個数: 24

約数和(自身を含む): 31699296

約数和(自身を除く): 10885811

約数列:

[1, 5, 7, 11, 35, 49, 55, 77, 245, 385, 539, 2695, 7723, 38615, 54061, 84953, 270305, 378427, 424765, 594671, 1892135, 2973355, 4162697, 20813485]

約数ペア:

[(1, 20813485), (5, 4162697), (7, 2973355), (11, 1892135), (35, 594671), (49, 424765), (55, 378427), (77, 270305), (245, 84953), (385, 54061), (539, 38615), (2695, 7723)]