20412819

素因数分解:

$3^2\times 7^1\times {\mathrm{457}}^1\times {\mathrm{709}}^1$

素因数の和:1179

約数の個数: 24

約数和(自身を含む): 33818720

約数和(自身を除く): 13405901

約数列:

[1, 3, 7, 9, 21, 63, 457, 709, 1371, 2127, 3199, 4113, 4963, 6381, 9597, 14889, 28791, 44667, 324013, 972039, 2268091, 2916117, 6804273, 20412819]

約数ペア:

[(1, 20412819), (3, 6804273), (7, 2916117), (9, 2268091), (21, 972039), (63, 324013), (457, 44667), (709, 28791), (1371, 14889), (2127, 9597), (3199, 6381), (4113, 4963)]