21406399

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{4289}}^1$

素因数の和:4350

約数の個数: 16

約数和(自身を含む): 26357760

約数和(自身を除く): 4951361

約数列:

[1, 7, 23, 31, 161, 217, 713, 4289, 4991, 30023, 98647, 132959, 690529, 930713, 3058057, 21406399]

約数ペア:

[(1, 21406399), (7, 3058057), (23, 930713), (31, 690529), (161, 132959), (217, 98647), (713, 30023), (4289, 4991)]