21573517

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{2851}}^1$

素因数の和:2928

約数の個数: 16

約数和(自身を含む): 26284032

約数和(自身を除く): 4710515

約数列:

[1, 7, 23, 47, 161, 329, 1081, 2851, 7567, 19957, 65573, 133997, 459011, 937979, 3081931, 21573517]

約数ペア:

[(1, 21573517), (7, 3081931), (23, 937979), (47, 459011), (161, 133997), (329, 65573), (1081, 19957), (2851, 7567)]