21137851

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{7723}}^1$

素因数の和:7770

約数の個数: 16

約数和(自身を含む): 26694144

約数和(自身を除く): 5556293

約数列:

[1, 7, 17, 23, 119, 161, 391, 2737, 7723, 54061, 131291, 177629, 919037, 1243403, 3019693, 21137851]

約数ペア:

[(1, 21137851), (7, 3019693), (17, 1243403), (23, 919037), (119, 177629), (161, 131291), (391, 54061), (2737, 7723)]