18221707

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{641}}^1$

素因数の和:810

約数の個数: 16

約数和(自身を含む): 21694464

約数和(自身を除く): 3472757

約数列:

[1, 7, 31, 131, 217, 641, 917, 4061, 4487, 19871, 28427, 83971, 139097, 587797, 2603101, 18221707]

約数ペア:

[(1, 18221707), (7, 2603101), (31, 587797), (131, 139097), (217, 83971), (641, 28427), (917, 19871), (4061, 4487)]