21978404

素因数分解:

$2^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{27067}}^1$

素因数の和:27107

約数の個数: 24

約数和(自身を含む): 45474240

約数和(自身を除く): 23495836

約数列:

[1, 2, 4, 7, 14, 28, 29, 58, 116, 203, 406, 812, 27067, 54134, 108268, 189469, 378938, 757876, 784943, 1569886, 3139772, 5494601, 10989202, 21978404]

約数ペア:

[(1, 21978404), (2, 10989202), (4, 5494601), (7, 3139772), (14, 1569886), (28, 784943), (29, 757876), (58, 378938), (116, 189469), (203, 108268), (406, 54134), (812, 27067)]