21871984

素因数分解:

$2^4\times {\mathrm{157}}^1\times {\mathrm{8707}}^1$

素因数の和:8872

約数の個数: 20

約数和(自身を含む): 42651784

約数和(自身を除く): 20779800

約数列:

[1, 2, 4, 8, 16, 157, 314, 628, 1256, 2512, 8707, 17414, 34828, 69656, 139312, 1366999, 2733998, 5467996, 10935992, 21871984]

約数ペア:

[(1, 21871984), (2, 10935992), (4, 5467996), (8, 2733998), (16, 1366999), (157, 139312), (314, 69656), (628, 34828), (1256, 17414), (2512, 8707)]