217558817

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{28751}}^1$

素因数の和:28828

約数の個数: 16

約数和(自身を含む): 264978432

約数和(自身を除く): 47419615

約数列:

[1, 7, 23, 47, 161, 329, 1081, 7567, 28751, 201257, 661273, 1351297, 4628911, 9459079, 31079831, 217558817]

約数ペア:

[(1, 217558817), (7, 31079831), (23, 9459079), (47, 4628911), (161, 1351297), (329, 661273), (1081, 201257), (7567, 28751)]