21907081

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{997}}^1$

素因数の和:1120

約数の個数: 16

約数和(自身を含む): 25995904

約数和(自身を除く): 4088823

約数列:

[1, 7, 43, 73, 301, 511, 997, 3139, 6979, 21973, 42871, 72781, 300097, 509467, 3129583, 21907081]

約数ペア:

[(1, 21907081), (7, 3129583), (43, 509467), (73, 300097), (301, 72781), (511, 42871), (997, 21973), (3139, 6979)]