21804688

素因数分解:

$2^4\times {\mathrm{101}}^1\times {\mathrm{103}}^1\times {\mathrm{131}}^1$

素因数の和:343

約数の個数: 40

約数和(自身を含む): 43407936

約数和(自身を除く): 21603248

約数列:

[1, 2, 4, 8, 16, 101, 103, 131, 202, 206, 262, 404, 412, 524, 808, 824, 1048, 1616, 1648, 2096, 10403, 13231, 13493, 20806, 26462, 26986, 41612, 52924, 53972, 83224, 105848, 107944, 166448, 211696, 215888, 1362793, 2725586, 5451172, 10902344, 21804688]

約数ペア:

[(1, 21804688), (2, 10902344), (4, 5451172), (8, 2725586), (16, 1362793), (101, 215888), (103, 211696), (131, 166448), (202, 107944), (206, 105848), (262, 83224), (404, 53972), (412, 52924), (524, 41612), (808, 26986), (824, 26462), (1048, 20806), (1616, 13493), (1648, 13231), (2096, 10403)]